Basic Framework

2024 archive

158 posts published in 2024.

December 31, 2024 · LeetCode · Post 313

LeetCode Card 313 — Trie / Structure

This pattern usually appears when the prompt involves prefix queries, incremental string matching, or dictionary search across characters. Implement Trie, Word Search II,…

Structureleetcoderesearch-card
December 29, 2024 · LeetCode · Post 312

LeetCode Card 312 — Trie / Assess

This pattern usually appears when the prompt involves prefix queries, incremental string matching, or dictionary search across characters. Implement Trie, Word Search II,…

Assessleetcoderesearch-card
December 26, 2024 · LeetCode · Post 311

LeetCode Card 311 — Trie / Breakdown

This pattern usually appears when the prompt involves prefix queries, incremental string matching, or dictionary search across characters. Implement Trie, Word Search II,…

Breakdownleetcoderesearch-card
December 24, 2024 · LeetCode · Post 310

LeetCode Card 310 — Backtracking / Check

This pattern usually appears when the prompt involves enumeration over choices with constraint pruning. Subsets, Combination Sum, Permutations, NQueens, and wordsearch style…

Checkleetcoderesearch-card
December 22, 2024 · LeetCode · Post 309

LeetCode Card 309 — Backtracking / Implement

This pattern usually appears when the prompt involves enumeration over choices with constraint pruning. Subsets, Combination Sum, Permutations, NQueens, and wordsearch style…

Implementleetcoderesearch-card
December 19, 2024 · LeetCode · Post 308

LeetCode Card 308 — Backtracking / Structure

This pattern usually appears when the prompt involves enumeration over choices with constraint pruning. Subsets, Combination Sum, Permutations, NQueens, and wordsearch style…

Structureleetcoderesearch-card
December 17, 2024 · LeetCode · Post 307

LeetCode Card 307 — Backtracking / Assess

This pattern usually appears when the prompt involves enumeration over choices with constraint pruning. Subsets, Combination Sum, Permutations, NQueens, and wordsearch style…

Assessleetcoderesearch-card
December 15, 2024 · LeetCode · Post 306

LeetCode Card 306 — Backtracking / Breakdown

This pattern usually appears when the prompt involves enumeration over choices with constraint pruning. Subsets, Combination Sum, Permutations, NQueens, and wordsearch style…

Breakdownleetcoderesearch-card
December 12, 2024 · LeetCode · Post 305

LeetCode Card 305 — Topological Sort / Check

This pattern usually appears when the prompt involves ordering with prerequisites in a DAG. Course Schedule, build order, dependency resolution, and task execution pipelines point…

Checkleetcoderesearch-card
December 10, 2024 · LeetCode · Post 304

LeetCode Card 304 — Topological Sort / Implement

This pattern usually appears when the prompt involves ordering with prerequisites in a DAG. Course Schedule, build order, dependency resolution, and task execution pipelines point…

Implementleetcoderesearch-card
December 8, 2024 · LeetCode · Post 303

LeetCode Card 303 — Topological Sort / Structure

This pattern usually appears when the prompt involves ordering with prerequisites in a DAG. Course Schedule, build order, dependency resolution, and task execution pipelines point…

Structureleetcoderesearch-card
December 6, 2024 · LeetCode · Post 302

LeetCode Card 302 — Topological Sort / Assess

This pattern usually appears when the prompt involves ordering with prerequisites in a DAG. Course Schedule, build order, dependency resolution, and task execution pipelines point…

Assessleetcoderesearch-card
December 3, 2024 · LeetCode · Post 301

LeetCode Card 301 — Topological Sort / Breakdown

This pattern usually appears when the prompt involves ordering with prerequisites in a DAG. Course Schedule, build order, dependency resolution, and task execution pipelines point…

Breakdownleetcoderesearch-card
December 1, 2024 · LeetCode · Post 300

LeetCode Card 300 — Union-Find / Check

This pattern usually appears when the prompt involves dynamic connectivity, component counting, or equivalence merging. Accounts Merge, Number of Connected Components, and…

Checkleetcoderesearch-card
November 29, 2024 · LeetCode · Post 299

LeetCode Card 299 — Union-Find / Implement

This pattern usually appears when the prompt involves dynamic connectivity, component counting, or equivalence merging. Accounts Merge, Number of Connected Components, and…

Implementleetcoderesearch-card
November 26, 2024 · LeetCode · Post 298

LeetCode Card 298 — Union-Find / Structure

This pattern usually appears when the prompt involves dynamic connectivity, component counting, or equivalence merging. Accounts Merge, Number of Connected Components, and…

Structureleetcoderesearch-card
November 24, 2024 · LeetCode · Post 297

LeetCode Card 297 — Union-Find / Assess

This pattern usually appears when the prompt involves dynamic connectivity, component counting, or equivalence merging. Accounts Merge, Number of Connected Components, and…

Assessleetcoderesearch-card
November 22, 2024 · LeetCode · Post 296

LeetCode Card 296 — Union-Find / Breakdown

This pattern usually appears when the prompt involves dynamic connectivity, component counting, or equivalence merging. Accounts Merge, Number of Connected Components, and…

Breakdownleetcoderesearch-card
November 19, 2024 · LeetCode · Post 295

LeetCode Card 295 — Graph BFS / Check

This pattern usually appears when the prompt involves shortest path in an unweighted graph, nearest transformation, or wavefront exploration. Rotting Oranges, Word Ladder, minimum…

Checkleetcoderesearch-card
November 17, 2024 · LeetCode · Post 294

LeetCode Card 294 — Graph BFS / Implement

This pattern usually appears when the prompt involves shortest path in an unweighted graph, nearest transformation, or wavefront exploration. Rotting Oranges, Word Ladder, minimum…

Implementleetcoderesearch-card
November 15, 2024 · LeetCode · Post 293

LeetCode Card 293 — Graph BFS / Structure

This pattern usually appears when the prompt involves shortest path in an unweighted graph, nearest transformation, or wavefront exploration. Rotting Oranges, Word Ladder, minimum…

Structureleetcoderesearch-card
November 12, 2024 · LeetCode · Post 292

LeetCode Card 292 — Graph BFS / Assess

This pattern usually appears when the prompt involves shortest path in an unweighted graph, nearest transformation, or wavefront exploration. Rotting Oranges, Word Ladder, minimum…

Assessleetcoderesearch-card
November 10, 2024 · LeetCode · Post 291

LeetCode Card 291 — Graph BFS / Breakdown

This pattern usually appears when the prompt involves shortest path in an unweighted graph, nearest transformation, or wavefront exploration. Rotting Oranges, Word Ladder, minimum…

Breakdownleetcoderesearch-card
November 8, 2024 · LeetCode · Post 290

LeetCode Card 290 — Graph DFS / Check

This pattern usually appears when the prompt involves connected components, path existence, cycle detection, or exhaustive traversal. Number of Islands, Clone Graph, course…

Checkleetcoderesearch-card
November 5, 2024 · LeetCode · Post 289

LeetCode Card 289 — Graph DFS / Implement

This pattern usually appears when the prompt involves connected components, path existence, cycle detection, or exhaustive traversal. Number of Islands, Clone Graph, course…

Implementleetcoderesearch-card
November 3, 2024 · LeetCode · Post 288

LeetCode Card 288 — Graph DFS / Structure

This pattern usually appears when the prompt involves connected components, path existence, cycle detection, or exhaustive traversal. Number of Islands, Clone Graph, course…

Structureleetcoderesearch-card
November 1, 2024 · LeetCode · Post 287

LeetCode Card 287 — Graph DFS / Assess

This pattern usually appears when the prompt involves connected components, path existence, cycle detection, or exhaustive traversal. Number of Islands, Clone Graph, course…

Assessleetcoderesearch-card
October 29, 2024 · LeetCode · Post 286

LeetCode Card 286 — Graph DFS / Breakdown

This pattern usually appears when the prompt involves connected components, path existence, cycle detection, or exhaustive traversal. Number of Islands, Clone Graph, course…

Breakdownleetcoderesearch-card
October 27, 2024 · LeetCode · Post 285

LeetCode Card 285 — Greedy / Check

This pattern usually appears when the prompt involves localchoice problems where a proof or intuition shows that the local move supports the global goal. Jump Game, Gas Station,…

Checkleetcoderesearch-card
October 25, 2024 · LeetCode · Post 284

LeetCode Card 284 — Greedy / Implement

This pattern usually appears when the prompt involves localchoice problems where a proof or intuition shows that the local move supports the global goal. Jump Game, Gas Station,…

Implementleetcoderesearch-card
October 22, 2024 · LeetCode · Post 283

LeetCode Card 283 — Greedy / Structure

This pattern usually appears when the prompt involves localchoice problems where a proof or intuition shows that the local move supports the global goal. Jump Game, Gas Station,…

Structureleetcoderesearch-card
October 20, 2024 · LeetCode · Post 282

LeetCode Card 282 — Greedy / Assess

This pattern usually appears when the prompt involves localchoice problems where a proof or intuition shows that the local move supports the global goal. Jump Game, Gas Station,…

Assessleetcoderesearch-card
October 18, 2024 · LeetCode · Post 281

LeetCode Card 281 — Greedy / Breakdown

This pattern usually appears when the prompt involves localchoice problems where a proof or intuition shows that the local move supports the global goal. Jump Game, Gas Station,…

Breakdownleetcoderesearch-card
October 15, 2024 · LeetCode · Post 280

LeetCode Card 280 — Intervals / Check

This pattern usually appears when the prompt involves overlap, merging, scheduling, or span comparison across ranges. Merge Intervals, Insert Interval, Meeting Rooms, and…

Checkleetcoderesearch-card
October 13, 2024 · LeetCode · Post 279

LeetCode Card 279 — Intervals / Implement

This pattern usually appears when the prompt involves overlap, merging, scheduling, or span comparison across ranges. Merge Intervals, Insert Interval, Meeting Rooms, and…

Implementleetcoderesearch-card
October 11, 2024 · LeetCode · Post 278

LeetCode Card 278 — Intervals / Structure

This pattern usually appears when the prompt involves overlap, merging, scheduling, or span comparison across ranges. Merge Intervals, Insert Interval, Meeting Rooms, and…

Structureleetcoderesearch-card
October 8, 2024 · LeetCode · Post 277

LeetCode Card 277 — Intervals / Assess

This pattern usually appears when the prompt involves overlap, merging, scheduling, or span comparison across ranges. Merge Intervals, Insert Interval, Meeting Rooms, and…

Assessleetcoderesearch-card
October 6, 2024 · LeetCode · Post 276

LeetCode Card 276 — Intervals / Breakdown

This pattern usually appears when the prompt involves overlap, merging, scheduling, or span comparison across ranges. Merge Intervals, Insert Interval, Meeting Rooms, and…

Breakdownleetcoderesearch-card
October 4, 2024 · LeetCode · Post 275

LeetCode Card 275 — Heaps and Priority Queues / Check

This pattern usually appears when the prompt involves repeated access to current min/max or topk items under ongoing updates. Kth Largest Element, Top K Frequent, Merge K Sorted…

Checkleetcoderesearch-card
October 2, 2024 · LeetCode · Post 274

LeetCode Card 274 — Heaps and Priority Queues / Implement

This pattern usually appears when the prompt involves repeated access to current min/max or topk items under ongoing updates. Kth Largest Element, Top K Frequent, Merge K Sorted…

Implementleetcoderesearch-card
September 29, 2024 · LeetCode · Post 273

LeetCode Card 273 — Heaps and Priority Queues / Structure

This pattern usually appears when the prompt involves repeated access to current min/max or topk items under ongoing updates. Kth Largest Element, Top K Frequent, Merge K Sorted…

Structureleetcoderesearch-card
September 27, 2024 · LeetCode · Post 272

LeetCode Card 272 — Heaps and Priority Queues / Assess

This pattern usually appears when the prompt involves repeated access to current min/max or topk items under ongoing updates. Kth Largest Element, Top K Frequent, Merge K Sorted…

Assessleetcoderesearch-card
September 25, 2024 · LeetCode · Post 271

LeetCode Card 271 — Heaps and Priority Queues / Breakdown

This pattern usually appears when the prompt involves repeated access to current min/max or topk items under ongoing updates. Kth Largest Element, Top K Frequent, Merge K Sorted…

Breakdownleetcoderesearch-card
September 22, 2024 · LeetCode · Post 270

LeetCode Card 270 — Binary Search Trees / Check

This pattern usually appears when the prompt involves ordered tree properties, rank queries, or pruning based on node value. Validate BST, Kth Smallest Element in a BST, Lowest…

Checkleetcoderesearch-card
September 20, 2024 · LeetCode · Post 269

LeetCode Card 269 — Binary Search Trees / Implement

This pattern usually appears when the prompt involves ordered tree properties, rank queries, or pruning based on node value. Validate BST, Kth Smallest Element in a BST, Lowest…

Implementleetcoderesearch-card
September 18, 2024 · LeetCode · Post 268

LeetCode Card 268 — Binary Search Trees / Structure

This pattern usually appears when the prompt involves ordered tree properties, rank queries, or pruning based on node value. Validate BST, Kth Smallest Element in a BST, Lowest…

Structureleetcoderesearch-card
September 15, 2024 · LeetCode · Post 267

LeetCode Card 267 — Binary Search Trees / Assess

This pattern usually appears when the prompt involves ordered tree properties, rank queries, or pruning based on node value. Validate BST, Kth Smallest Element in a BST, Lowest…

Assessleetcoderesearch-card
September 13, 2024 · LeetCode · Post 266

LeetCode Card 266 — Binary Search Trees / Breakdown

This pattern usually appears when the prompt involves ordered tree properties, rank queries, or pruning based on node value. Validate BST, Kth Smallest Element in a BST, Lowest…

Breakdownleetcoderesearch-card
September 11, 2024 · LeetCode · Post 265

LeetCode Card 265 — Tree BFS / Check

This pattern usually appears when the prompt involves levelbylevel grouping, shortest unweighted path from a root, or nearestlayer reasoning. Binary Tree Level Order Traversal,…

Checkleetcoderesearch-card
September 8, 2024 · LeetCode · Post 264

LeetCode Card 264 — Tree BFS / Implement

This pattern usually appears when the prompt involves levelbylevel grouping, shortest unweighted path from a root, or nearestlayer reasoning. Binary Tree Level Order Traversal,…

Implementleetcoderesearch-card
September 6, 2024 · LeetCode · Post 263

LeetCode Card 263 — Tree BFS / Structure

This pattern usually appears when the prompt involves levelbylevel grouping, shortest unweighted path from a root, or nearestlayer reasoning. Binary Tree Level Order Traversal,…

Structureleetcoderesearch-card
September 4, 2024 · LeetCode · Post 262

LeetCode Card 262 — Tree BFS / Assess

This pattern usually appears when the prompt involves levelbylevel grouping, shortest unweighted path from a root, or nearestlayer reasoning. Binary Tree Level Order Traversal,…

Assessleetcoderesearch-card
September 1, 2024 · LeetCode · Post 261

LeetCode Card 261 — Tree BFS / Breakdown

This pattern usually appears when the prompt involves levelbylevel grouping, shortest unweighted path from a root, or nearestlayer reasoning. Binary Tree Level Order Traversal,…

Breakdownleetcoderesearch-card
August 30, 2024 · LeetCode · Post 260

LeetCode Card 260 — Tree DFS / Check

This pattern usually appears when the prompt involves recursive subtree questions about depth, identity, path sums, construction, or transformation. Invert Binary Tree, Maximum…

Checkleetcoderesearch-card
August 28, 2024 · LeetCode · Post 259

LeetCode Card 259 — Tree DFS / Implement

This pattern usually appears when the prompt involves recursive subtree questions about depth, identity, path sums, construction, or transformation. Invert Binary Tree, Maximum…

Implementleetcoderesearch-card
August 25, 2024 · LeetCode · Post 258

LeetCode Card 258 — Tree DFS / Structure

This pattern usually appears when the prompt involves recursive subtree questions about depth, identity, path sums, construction, or transformation. Invert Binary Tree, Maximum…

Structureleetcoderesearch-card
August 23, 2024 · LeetCode · Post 257

LeetCode Card 257 — Tree DFS / Assess

This pattern usually appears when the prompt involves recursive subtree questions about depth, identity, path sums, construction, or transformation. Invert Binary Tree, Maximum…

Assessleetcoderesearch-card
August 21, 2024 · LeetCode · Post 256

LeetCode Card 256 — Tree DFS / Breakdown

This pattern usually appears when the prompt involves recursive subtree questions about depth, identity, path sums, construction, or transformation. Invert Binary Tree, Maximum…

Breakdownleetcoderesearch-card
August 18, 2024 · LeetCode · Post 255

LeetCode Card 255 — Fast and Slow Pointers / Check

This pattern usually appears when the prompt involves cycle detection, midpoint discovery, or relativespeed traversal. Linked List Cycle, Palindrome Linked List, and finding list…

Checkleetcoderesearch-card
August 16, 2024 · LeetCode · Post 254

LeetCode Card 254 — Fast and Slow Pointers / Implement

This pattern usually appears when the prompt involves cycle detection, midpoint discovery, or relativespeed traversal. Linked List Cycle, Palindrome Linked List, and finding list…

Implementleetcoderesearch-card
August 14, 2024 · LeetCode · Post 253

LeetCode Card 253 — Fast and Slow Pointers / Structure

This pattern usually appears when the prompt involves cycle detection, midpoint discovery, or relativespeed traversal. Linked List Cycle, Palindrome Linked List, and finding list…

Structureleetcoderesearch-card
August 11, 2024 · LeetCode · Post 252

LeetCode Card 252 — Fast and Slow Pointers / Assess

This pattern usually appears when the prompt involves cycle detection, midpoint discovery, or relativespeed traversal. Linked List Cycle, Palindrome Linked List, and finding list…

Assessleetcoderesearch-card
August 9, 2024 · LeetCode · Post 251

LeetCode Card 251 — Fast and Slow Pointers / Breakdown

This pattern usually appears when the prompt involves cycle detection, midpoint discovery, or relativespeed traversal. Linked List Cycle, Palindrome Linked List, and finding list…

Breakdownleetcoderesearch-card
August 7, 2024 · LeetCode · Post 250

LeetCode Card 250 — Linked List / Check

This pattern usually appears when the prompt involves pointer rewiring, nodebynode traversal, or inplace reordering without random access. Reverse Linked List, Merge Two Lists,…

Checkleetcoderesearch-card
August 5, 2024 · LeetCode · Post 249

LeetCode Card 249 — Linked List / Implement

This pattern usually appears when the prompt involves pointer rewiring, nodebynode traversal, or inplace reordering without random access. Reverse Linked List, Merge Two Lists,…

Implementleetcoderesearch-card
August 2, 2024 · LeetCode · Post 248

LeetCode Card 248 — Linked List / Structure

This pattern usually appears when the prompt involves pointer rewiring, nodebynode traversal, or inplace reordering without random access. Reverse Linked List, Merge Two Lists,…

Structureleetcoderesearch-card
July 31, 2024 · LeetCode · Post 247

LeetCode Card 247 — Linked List / Assess

This pattern usually appears when the prompt involves pointer rewiring, nodebynode traversal, or inplace reordering without random access. Reverse Linked List, Merge Two Lists,…

Assessleetcoderesearch-card
July 29, 2024 · LeetCode · Post 246

LeetCode Card 246 — Linked List / Breakdown

This pattern usually appears when the prompt involves pointer rewiring, nodebynode traversal, or inplace reordering without random access. Reverse Linked List, Merge Two Lists,…

Breakdownleetcoderesearch-card
July 26, 2024 · LeetCode · Post 245

LeetCode Card 245 — Queue and Deque / Check

This pattern usually appears when the prompt involves levelorder processing, FIFO workflows, or windows where both ends matter. Binary Tree Level Order Traversal, movingaverage…

Checkleetcoderesearch-card
July 24, 2024 · LeetCode · Post 244

LeetCode Card 244 — Queue and Deque / Implement

This pattern usually appears when the prompt involves levelorder processing, FIFO workflows, or windows where both ends matter. Binary Tree Level Order Traversal, movingaverage…

Implementleetcoderesearch-card
July 22, 2024 · LeetCode · Post 243

LeetCode Card 243 — Queue and Deque / Structure

This pattern usually appears when the prompt involves levelorder processing, FIFO workflows, or windows where both ends matter. Binary Tree Level Order Traversal, movingaverage…

Structureleetcoderesearch-card
July 19, 2024 · LeetCode · Post 242

LeetCode Card 242 — Queue and Deque / Assess

This pattern usually appears when the prompt involves levelorder processing, FIFO workflows, or windows where both ends matter. Binary Tree Level Order Traversal, movingaverage…

Assessleetcoderesearch-card
July 17, 2024 · LeetCode · Post 241

LeetCode Card 241 — Queue and Deque / Breakdown

This pattern usually appears when the prompt involves levelorder processing, FIFO workflows, or windows where both ends matter. Binary Tree Level Order Traversal, movingaverage…

Breakdownleetcoderesearch-card
July 15, 2024 · LeetCode · Post 240

LeetCode Card 240 — Stack / Check

This pattern usually appears when the prompt involves nested structure, undostyle behavior, monotonic maintenance, or immediate access to the most recent unresolved item. Valid…

Checkleetcoderesearch-card
July 12, 2024 · LeetCode · Post 239

LeetCode Card 239 — Stack / Implement

This pattern usually appears when the prompt involves nested structure, undostyle behavior, monotonic maintenance, or immediate access to the most recent unresolved item. Valid…

Implementleetcoderesearch-card
July 10, 2024 · LeetCode · Post 238

LeetCode Card 238 — Stack / Structure

This pattern usually appears when the prompt involves nested structure, undostyle behavior, monotonic maintenance, or immediate access to the most recent unresolved item. Valid…

Structureleetcoderesearch-card
July 8, 2024 · LeetCode · Post 237

LeetCode Card 237 — Stack / Assess

This pattern usually appears when the prompt involves nested structure, undostyle behavior, monotonic maintenance, or immediate access to the most recent unresolved item. Valid…

Assessleetcoderesearch-card
July 5, 2024 · LeetCode · Post 236

LeetCode Card 236 — Stack / Breakdown

This pattern usually appears when the prompt involves nested structure, undostyle behavior, monotonic maintenance, or immediate access to the most recent unresolved item. Valid…

Breakdownleetcoderesearch-card
July 3, 2024 · LeetCode · Post 235

LeetCode Card 235 — Binary Search / Check

This pattern usually appears when the prompt involves sorted structure or hidden monotonic predicate. Search Insert Position, Search in Rotated Sorted Array, first/last…

Checkleetcoderesearch-card
July 1, 2024 · LeetCode · Post 234

LeetCode Card 234 — Binary Search / Implement

This pattern usually appears when the prompt involves sorted structure or hidden monotonic predicate. Search Insert Position, Search in Rotated Sorted Array, first/last…

Implementleetcoderesearch-card
June 28, 2024 · LeetCode · Post 233

LeetCode Card 233 — Binary Search / Structure

This pattern usually appears when the prompt involves sorted structure or hidden monotonic predicate. Search Insert Position, Search in Rotated Sorted Array, first/last…

Structureleetcoderesearch-card
June 26, 2024 · LeetCode · Post 232

LeetCode Card 232 — Binary Search / Assess

This pattern usually appears when the prompt involves sorted structure or hidden monotonic predicate. Search Insert Position, Search in Rotated Sorted Array, first/last…

Assessleetcoderesearch-card
June 24, 2024 · LeetCode · Post 231

LeetCode Card 231 — Binary Search / Breakdown

This pattern usually appears when the prompt involves sorted structure or hidden monotonic predicate. Search Insert Position, Search in Rotated Sorted Array, first/last…

Breakdownleetcoderesearch-card
June 21, 2024 · LeetCode · Post 230

LeetCode Card 230 — Prefix Sums / Check

This pattern usually appears when the prompt involves range sums, subarray totals, balance counting, or repeated aggregate queries. Subarray Sum Equals K, Range Sum Query, and…

Checkleetcoderesearch-card
June 19, 2024 · LeetCode · Post 229

LeetCode Card 229 — Prefix Sums / Implement

This pattern usually appears when the prompt involves range sums, subarray totals, balance counting, or repeated aggregate queries. Subarray Sum Equals K, Range Sum Query, and…

Implementleetcoderesearch-card
June 17, 2024 · LeetCode · Post 228

LeetCode Card 228 — Prefix Sums / Structure

This pattern usually appears when the prompt involves range sums, subarray totals, balance counting, or repeated aggregate queries. Subarray Sum Equals K, Range Sum Query, and…

Structureleetcoderesearch-card
June 14, 2024 · LeetCode · Post 227

LeetCode Card 227 — Prefix Sums / Assess

This pattern usually appears when the prompt involves range sums, subarray totals, balance counting, or repeated aggregate queries. Subarray Sum Equals K, Range Sum Query, and…

Assessleetcoderesearch-card
June 12, 2024 · LeetCode · Post 226

LeetCode Card 226 — Prefix Sums / Breakdown

This pattern usually appears when the prompt involves range sums, subarray totals, balance counting, or repeated aggregate queries. Subarray Sum Equals K, Range Sum Query, and…

Breakdownleetcoderesearch-card
June 10, 2024 · LeetCode · Post 225

LeetCode Card 225 — Sliding Window / Check

This pattern usually appears when the prompt involves contiguous substring or subarray optimization with a condition that changes as the window moves. Classic examples include…

Checkleetcoderesearch-card
June 8, 2024 · LeetCode · Post 224

LeetCode Card 224 — Sliding Window / Implement

This pattern usually appears when the prompt involves contiguous substring or subarray optimization with a condition that changes as the window moves. Classic examples include…

Implementleetcoderesearch-card
June 5, 2024 · LeetCode · Post 223

LeetCode Card 223 — Sliding Window / Structure

This pattern usually appears when the prompt involves contiguous substring or subarray optimization with a condition that changes as the window moves. Classic examples include…

Structureleetcoderesearch-card
June 3, 2024 · LeetCode · Post 222

LeetCode Card 222 — Sliding Window / Assess

This pattern usually appears when the prompt involves contiguous substring or subarray optimization with a condition that changes as the window moves. Classic examples include…

Assessleetcoderesearch-card
June 1, 2024 · LeetCode · Post 221

LeetCode Card 221 — Sliding Window / Breakdown

This pattern usually appears when the prompt involves contiguous substring or subarray optimization with a condition that changes as the window moves. Classic examples include…

Breakdownleetcoderesearch-card
May 29, 2024 · LeetCode · Post 220

LeetCode Card 220 — Two Pointers / Check

This pattern usually appears when the prompt involves sorted input, pair discovery, compaction, palindromic checks, or inplace partitioning. Think Two Sum II, 3Sum substeps,…

Checkleetcoderesearch-card
May 27, 2024 · LeetCode · Post 219

LeetCode Card 219 — Two Pointers / Implement

This pattern usually appears when the prompt involves sorted input, pair discovery, compaction, palindromic checks, or inplace partitioning. Think Two Sum II, 3Sum substeps,…

Implementleetcoderesearch-card
May 25, 2024 · LeetCode · Post 218

LeetCode Card 218 — Two Pointers / Structure

This pattern usually appears when the prompt involves sorted input, pair discovery, compaction, palindromic checks, or inplace partitioning. Think Two Sum II, 3Sum substeps,…

Structureleetcoderesearch-card
May 22, 2024 · LeetCode · Post 217

LeetCode Card 217 — Two Pointers / Assess

This pattern usually appears when the prompt involves sorted input, pair discovery, compaction, palindromic checks, or inplace partitioning. Think Two Sum II, 3Sum substeps,…

Assessleetcoderesearch-card
May 20, 2024 · LeetCode · Post 216

LeetCode Card 216 — Two Pointers / Breakdown

This pattern usually appears when the prompt involves sorted input, pair discovery, compaction, palindromic checks, or inplace partitioning. Think Two Sum II, 3Sum substeps,…

Breakdownleetcoderesearch-card
May 18, 2024 · LeetCode · Post 215

LeetCode Card 215 — Strings / Check

This pattern usually appears when the prompt involves normalization, parsing, frequency, slicing, or characterwise conditions. Typical prompts include Valid Palindrome, Longest…

Checkleetcoderesearch-card
May 15, 2024 · LeetCode · Post 214

LeetCode Card 214 — Strings / Implement

This pattern usually appears when the prompt involves normalization, parsing, frequency, slicing, or characterwise conditions. Typical prompts include Valid Palindrome, Longest…

Implementleetcoderesearch-card
May 13, 2024 · LeetCode · Post 213

LeetCode Card 213 — Strings / Structure

This pattern usually appears when the prompt involves normalization, parsing, frequency, slicing, or characterwise conditions. Typical prompts include Valid Palindrome, Longest…

Structureleetcoderesearch-card
May 11, 2024 · LeetCode · Post 212

LeetCode Card 212 — Strings / Assess

This pattern usually appears when the prompt involves normalization, parsing, frequency, slicing, or characterwise conditions. Typical prompts include Valid Palindrome, Longest…

Assessleetcoderesearch-card
May 8, 2024 · LeetCode · Post 211

LeetCode Card 211 — Strings / Breakdown

This pattern usually appears when the prompt involves normalization, parsing, frequency, slicing, or characterwise conditions. Typical prompts include Valid Palindrome, Longest…

Breakdownleetcoderesearch-card
May 6, 2024 · LeetCode · Post 210

LeetCode Card 210 — Arrays and Hashing / Check

This pattern usually appears when the prompt involves lookup, duplicate detection, counting, grouping, or direct indexbased traversal. Problems like Two Sum, Contains Duplicate,…

Checkleetcoderesearch-card
May 4, 2024 · LeetCode · Post 209

LeetCode Card 209 — Arrays and Hashing / Implement

This pattern usually appears when the prompt involves lookup, duplicate detection, counting, grouping, or direct indexbased traversal. Problems like Two Sum, Contains Duplicate,…

Implementleetcoderesearch-card
May 1, 2024 · LeetCode · Post 208

LeetCode Card 208 — Arrays and Hashing / Structure

This pattern usually appears when the prompt involves lookup, duplicate detection, counting, grouping, or direct indexbased traversal. Problems like Two Sum, Contains Duplicate,…

Structureleetcoderesearch-card
April 29, 2024 · LeetCode · Post 207

LeetCode Card 207 — Arrays and Hashing / Assess

This pattern usually appears when the prompt involves lookup, duplicate detection, counting, grouping, or direct indexbased traversal. Problems like Two Sum, Contains Duplicate,…

Assessleetcoderesearch-card
April 27, 2024 · LeetCode · Post 206

LeetCode Card 206 — Arrays and Hashing / Breakdown

This pattern usually appears when the prompt involves lookup, duplicate detection, counting, grouping, or direct indexbased traversal. Problems like Two Sum, Contains Duplicate,…

Breakdownleetcoderesearch-card
April 24, 2024 · BASIC vs STAR · Post 205

Comparison Card 205 — Project Technical Deep Dive / Check

A technical deep dive on a past project still asks for architecture logic, constraints, tradeoffs, and validation. In this setting, the active interview task is happening now, not…

Checkcomparisonresearch-cardBASIC vs STAR
April 22, 2024 · BASIC vs STAR · Post 204

Comparison Card 204 — Project Technical Deep Dive / Implement

A technical deep dive on a past project still asks for architecture logic, constraints, tradeoffs, and validation. In this setting, the active interview task is happening now, not…

Implementcomparisonresearch-cardBASIC vs STAR
April 20, 2024 · BASIC vs STAR · Post 203

Comparison Card 203 — Project Technical Deep Dive / Structure

A technical deep dive on a past project still asks for architecture logic, constraints, tradeoffs, and validation. In this setting, the active interview task is happening now, not…

Structurecomparisonresearch-cardBASIC vs STAR
April 17, 2024 · BASIC vs STAR · Post 202

Comparison Card 202 — Project Technical Deep Dive / Assess

A technical deep dive on a past project still asks for architecture logic, constraints, tradeoffs, and validation. In this setting, the active interview task is happening now, not…

Assesscomparisonresearch-cardBASIC vs STAR
April 15, 2024 · BASIC vs STAR · Post 201

Comparison Card 201 — Project Technical Deep Dive / Breakdown

A technical deep dive on a past project still asks for architecture logic, constraints, tradeoffs, and validation. In this setting, the active interview task is happening now, not…

Breakdowncomparisonresearch-cardBASIC vs STAR
April 13, 2024 · BASIC vs STAR · Post 200

Comparison Card 200 — Staff-Level Technical Strategy / Check

Stafflevel rounds test prioritization, architecture, risk, and decision framing across a larger technical surface. In this setting, the active interview task is happening now, not…

Checkcomparisonresearch-cardBASIC vs STAR
April 10, 2024 · BASIC vs STAR · Post 199

Comparison Card 199 — Staff-Level Technical Strategy / Implement

Stafflevel rounds test prioritization, architecture, risk, and decision framing across a larger technical surface. In this setting, the active interview task is happening now, not…

Implementcomparisonresearch-cardBASIC vs STAR
April 8, 2024 · BASIC vs STAR · Post 198

Comparison Card 198 — Staff-Level Technical Strategy / Structure

Stafflevel rounds test prioritization, architecture, risk, and decision framing across a larger technical surface. In this setting, the active interview task is happening now, not…

Structurecomparisonresearch-cardBASIC vs STAR
April 6, 2024 · BASIC vs STAR · Post 197

Comparison Card 197 — Staff-Level Technical Strategy / Assess

Stafflevel rounds test prioritization, architecture, risk, and decision framing across a larger technical surface. In this setting, the active interview task is happening now, not…

Assesscomparisonresearch-cardBASIC vs STAR
April 4, 2024 · BASIC vs STAR · Post 196

Comparison Card 196 — Staff-Level Technical Strategy / Breakdown

Stafflevel rounds test prioritization, architecture, risk, and decision framing across a larger technical surface. In this setting, the active interview task is happening now, not…

Breakdowncomparisonresearch-cardBASIC vs STAR
April 1, 2024 · BASIC vs STAR · Post 195

Comparison Card 195 — Online Assessment Debrief / Check

Some interviews revisit a submitted solution and ask the candidate to justify choices or improve it. In this setting, the active interview task is happening now, not in the past.

Checkcomparisonresearch-cardBASIC vs STAR
March 30, 2024 · BASIC vs STAR · Post 194

Comparison Card 194 — Online Assessment Debrief / Implement

Some interviews revisit a submitted solution and ask the candidate to justify choices or improve it. In this setting, the active interview task is happening now, not in the past.

Implementcomparisonresearch-cardBASIC vs STAR
March 28, 2024 · BASIC vs STAR · Post 193

Comparison Card 193 — Online Assessment Debrief / Structure

Some interviews revisit a submitted solution and ask the candidate to justify choices or improve it. In this setting, the active interview task is happening now, not in the past.

Structurecomparisonresearch-cardBASIC vs STAR
March 25, 2024 · BASIC vs STAR · Post 192

Comparison Card 192 — Online Assessment Debrief / Assess

Some interviews revisit a submitted solution and ask the candidate to justify choices or improve it. In this setting, the active interview task is happening now, not in the past.

Assesscomparisonresearch-cardBASIC vs STAR
March 23, 2024 · BASIC vs STAR · Post 191

Comparison Card 191 — Online Assessment Debrief / Breakdown

Some interviews revisit a submitted solution and ask the candidate to justify choices or improve it. In this setting, the active interview task is happening now, not in the past.

Breakdowncomparisonresearch-cardBASIC vs STAR
March 21, 2024 · BASIC vs STAR · Post 190

Comparison Card 190 — Live Whiteboard / Check

Whiteboard rounds remove execution comforts and amplify the cost of disorganized thinking. In this setting, the active interview task is happening now, not in the past.

Checkcomparisonresearch-cardBASIC vs STAR
March 18, 2024 · BASIC vs STAR · Post 189

Comparison Card 189 — Live Whiteboard / Implement

Whiteboard rounds remove execution comforts and amplify the cost of disorganized thinking. In this setting, the active interview task is happening now, not in the past.

Implementcomparisonresearch-cardBASIC vs STAR
March 16, 2024 · BASIC vs STAR · Post 188

Comparison Card 188 — Live Whiteboard / Structure

Whiteboard rounds remove execution comforts and amplify the cost of disorganized thinking. In this setting, the active interview task is happening now, not in the past.

Structurecomparisonresearch-cardBASIC vs STAR
March 14, 2024 · BASIC vs STAR · Post 187

Comparison Card 187 — Live Whiteboard / Assess

Whiteboard rounds remove execution comforts and amplify the cost of disorganized thinking. In this setting, the active interview task is happening now, not in the past.

Assesscomparisonresearch-cardBASIC vs STAR
March 11, 2024 · BASIC vs STAR · Post 186

Comparison Card 186 — Live Whiteboard / Breakdown

Whiteboard rounds remove execution comforts and amplify the cost of disorganized thinking. In this setting, the active interview task is happening now, not in the past.

Breakdowncomparisonresearch-cardBASIC vs STAR
March 9, 2024 · BASIC vs STAR · Post 185

Comparison Card 185 — Pair Programming / Check

Pairprogramming rounds test collaboration, communication, and shared problem solving in real time. In this setting, the active interview task is happening now, not in the past.

Checkcomparisonresearch-cardBASIC vs STAR
March 7, 2024 · BASIC vs STAR · Post 184

Comparison Card 184 — Pair Programming / Implement

Pairprogramming rounds test collaboration, communication, and shared problem solving in real time. In this setting, the active interview task is happening now, not in the past.

Implementcomparisonresearch-cardBASIC vs STAR
March 4, 2024 · BASIC vs STAR · Post 183

Comparison Card 183 — Pair Programming / Structure

Pairprogramming rounds test collaboration, communication, and shared problem solving in real time. In this setting, the active interview task is happening now, not in the past.

Structurecomparisonresearch-cardBASIC vs STAR
March 2, 2024 · BASIC vs STAR · Post 182

Comparison Card 182 — Pair Programming / Assess

Pairprogramming rounds test collaboration, communication, and shared problem solving in real time. In this setting, the active interview task is happening now, not in the past.

Assesscomparisonresearch-cardBASIC vs STAR
February 29, 2024 · BASIC vs STAR · Post 181

Comparison Card 181 — Pair Programming / Breakdown

Pairprogramming rounds test collaboration, communication, and shared problem solving in real time. In this setting, the active interview task is happening now, not in the past.

Breakdowncomparisonresearch-cardBASIC vs STAR
February 26, 2024 · BASIC vs STAR · Post 180

Comparison Card 180 — Take-Home Defense / Check

Defending a takehome requires explaining choices, constraints, compromises, and followup improvements. In this setting, the active interview task is happening now, not in the past.

Checkcomparisonresearch-cardBASIC vs STAR
February 24, 2024 · BASIC vs STAR · Post 179

Comparison Card 179 — Take-Home Defense / Implement

Defending a takehome requires explaining choices, constraints, compromises, and followup improvements. In this setting, the active interview task is happening now, not in the past.

Implementcomparisonresearch-cardBASIC vs STAR
February 22, 2024 · BASIC vs STAR · Post 178

Comparison Card 178 — Take-Home Defense / Structure

Defending a takehome requires explaining choices, constraints, compromises, and followup improvements. In this setting, the active interview task is happening now, not in the past.

Structurecomparisonresearch-cardBASIC vs STAR
February 19, 2024 · BASIC vs STAR · Post 177

Comparison Card 177 — Take-Home Defense / Assess

Defending a takehome requires explaining choices, constraints, compromises, and followup improvements. In this setting, the active interview task is happening now, not in the past.

Assesscomparisonresearch-cardBASIC vs STAR
February 17, 2024 · BASIC vs STAR · Post 176

Comparison Card 176 — Take-Home Defense / Breakdown

Defending a takehome requires explaining choices, constraints, compromises, and followup improvements. In this setting, the active interview task is happening now, not in the past.

Breakdowncomparisonresearch-cardBASIC vs STAR
February 15, 2024 · BASIC vs STAR · Post 175

Comparison Card 175 — Architecture Review / Check

An architecturereview interview asks whether you can critique and improve a proposed system. In this setting, the active interview task is happening now, not in the past.

Checkcomparisonresearch-cardBASIC vs STAR
February 12, 2024 · BASIC vs STAR · Post 174

Comparison Card 174 — Architecture Review / Implement

An architecturereview interview asks whether you can critique and improve a proposed system. In this setting, the active interview task is happening now, not in the past.

Implementcomparisonresearch-cardBASIC vs STAR
February 10, 2024 · BASIC vs STAR · Post 173

Comparison Card 173 — Architecture Review / Structure

An architecturereview interview asks whether you can critique and improve a proposed system. In this setting, the active interview task is happening now, not in the past.

Structurecomparisonresearch-cardBASIC vs STAR
February 8, 2024 · BASIC vs STAR · Post 172

Comparison Card 172 — Architecture Review / Assess

An architecturereview interview asks whether you can critique and improve a proposed system. In this setting, the active interview task is happening now, not in the past.

Assesscomparisonresearch-cardBASIC vs STAR
February 6, 2024 · BASIC vs STAR · Post 171

Comparison Card 171 — Architecture Review / Breakdown

An architecturereview interview asks whether you can critique and improve a proposed system. In this setting, the active interview task is happening now, not in the past.

Breakdowncomparisonresearch-cardBASIC vs STAR
February 3, 2024 · BASIC vs STAR · Post 170

Comparison Card 170 — Reliability and Failure Modes / Check

Reliabilityfocused rounds test whether the candidate thinks beyond the happy path. In this setting, the active interview task is happening now, not in the past.

Checkcomparisonresearch-cardBASIC vs STAR
February 1, 2024 · BASIC vs STAR · Post 169

Comparison Card 169 — Reliability and Failure Modes / Implement

Reliabilityfocused rounds test whether the candidate thinks beyond the happy path. In this setting, the active interview task is happening now, not in the past.

Implementcomparisonresearch-cardBASIC vs STAR
January 30, 2024 · BASIC vs STAR · Post 168

Comparison Card 168 — Reliability and Failure Modes / Structure

Reliabilityfocused rounds test whether the candidate thinks beyond the happy path. In this setting, the active interview task is happening now, not in the past.

Structurecomparisonresearch-cardBASIC vs STAR
January 27, 2024 · BASIC vs STAR · Post 167

Comparison Card 167 — Reliability and Failure Modes / Assess

Reliabilityfocused rounds test whether the candidate thinks beyond the happy path. In this setting, the active interview task is happening now, not in the past.

Assesscomparisonresearch-cardBASIC vs STAR
January 25, 2024 · BASIC vs STAR · Post 166

Comparison Card 166 — Reliability and Failure Modes / Breakdown

Reliabilityfocused rounds test whether the candidate thinks beyond the happy path. In this setting, the active interview task is happening now, not in the past.

Breakdowncomparisonresearch-cardBASIC vs STAR
January 23, 2024 · BASIC vs STAR · Post 165

Comparison Card 165 — Scalability Bottleneck Discussion / Check

Some rounds are less about building from zero and more about identifying what breaks first. In this setting, the active interview task is happening now, not in the past.

Checkcomparisonresearch-cardBASIC vs STAR
January 20, 2024 · BASIC vs STAR · Post 164

Comparison Card 164 — Scalability Bottleneck Discussion / Implement

Some rounds are less about building from zero and more about identifying what breaks first. In this setting, the active interview task is happening now, not in the past.

Implementcomparisonresearch-cardBASIC vs STAR
January 18, 2024 · BASIC vs STAR · Post 163

Comparison Card 163 — Scalability Bottleneck Discussion / Structure

Some rounds are less about building from zero and more about identifying what breaks first. In this setting, the active interview task is happening now, not in the past.

Structurecomparisonresearch-cardBASIC vs STAR
January 16, 2024 · BASIC vs STAR · Post 162

Comparison Card 162 — Scalability Bottleneck Discussion / Assess

Some rounds are less about building from zero and more about identifying what breaks first. In this setting, the active interview task is happening now, not in the past.

Assesscomparisonresearch-cardBASIC vs STAR
January 13, 2024 · BASIC vs STAR · Post 161

Comparison Card 161 — Scalability Bottleneck Discussion / Breakdown

Some rounds are less about building from zero and more about identifying what breaks first. In this setting, the active interview task is happening now, not in the past.

Breakdowncomparisonresearch-cardBASIC vs STAR
January 11, 2024 · BASIC vs STAR · Post 160

Comparison Card 160 — Data Model Deep Dive / Check

A datamodel interview tests whether entities, relationships, and access patterns line up. In this setting, the active interview task is happening now, not in the past.

Checkcomparisonresearch-cardBASIC vs STAR
January 9, 2024 · BASIC vs STAR · Post 159

Comparison Card 159 — Data Model Deep Dive / Implement

A datamodel interview tests whether entities, relationships, and access patterns line up. In this setting, the active interview task is happening now, not in the past.

Implementcomparisonresearch-cardBASIC vs STAR
January 6, 2024 · BASIC vs STAR · Post 158

Comparison Card 158 — Data Model Deep Dive / Structure

A datamodel interview tests whether entities, relationships, and access patterns line up. In this setting, the active interview task is happening now, not in the past.

Structurecomparisonresearch-cardBASIC vs STAR
January 4, 2024 · BASIC vs STAR · Post 157

Comparison Card 157 — Data Model Deep Dive / Assess

A datamodel interview tests whether entities, relationships, and access patterns line up. In this setting, the active interview task is happening now, not in the past.

Assesscomparisonresearch-cardBASIC vs STAR
January 2, 2024 · BASIC vs STAR · Post 156

Comparison Card 156 — Data Model Deep Dive / Breakdown

A datamodel interview tests whether entities, relationships, and access patterns line up. In this setting, the active interview task is happening now, not in the past.

Breakdowncomparisonresearch-cardBASIC vs STAR