Tag: a-hash

All the articles with the tag "a-hash".

• LeetCode 2131 Longest Palindrome by Concatenating Two Letter Words

  29 Jun, 2026

  Solutions for LeetCode 2131, medium, tags: array, hash table, string, greedy, counting.

• LeetCode 752 Open the Lock

  26 Jun, 2026

  Solutions for LeetCode 752, medium, tags: array, hash table, string, breadth-first search.

• LeetCode 380 Insert Delete GetRandom O(1)

  12 Jun, 2026

  Solutions for LeetCode 380, medium, tags: array, hash table, math, design, randomized.

• LeetCode 525 Contiguous Array

  7 Jun, 2026

  Solutions for LeetCode 525, medium, tags: array, hash table, prefix sum.

• LeetCode 621 Task Scheduler

  23 May, 2026

  Solutions for LeetCode 621, medium, tags: array, hash table, greedy, sorting, heap, counting.

• LeetCode 424 Longest Repeating Character Replacement

  18 May, 2026

  Solutions for LeetCode 424, medium, tags: string, sliding window, hash table, binary search.