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Leetcode 2351: First Letter to Appear Twice

Given a string s of lowercase English letters, return the first letter that appears twice.

Mar 16, 2024 - 4 min read

Leetcode 2352: Equal Row and Column Pairs

Given a square matrix of integers, find the number of pairs of row and column indices where the row and column are equal in terms of their elements and their order.

Mar 16, 2024 - 4 min read

Leetcode 2353: Design a Food Rating System

Design a food rating system that allows modification of food ratings and can return the highest-rated food item for a given cuisine. In case of a tie, the lexicographically smallest food item should be returned.

Mar 16, 2024 - 6 min read

Leetcode 2357: Make Array Zero by Subtracting Equal Amounts

You are given a non-negative integer array nums. In each operation, you must:

  • Choose a positive integer x that is less than or equal to the smallest non-zero element in nums.
  • Subtract x from every positive element in nums.

Return the minimum number of operations to make every element in nums equal to 0.

Mar 16, 2024 - 4 min read

Leetcode 2363: Merge Similar Items

You are given two 2D integer arrays, items1 and items2, each representing a set of items. Each item has a value and a weight. You need to combine both arrays by summing the weights of items with the same value, and return the result as a 2D array, sorted by the item values in ascending order.

Mar 15, 2024 - 5 min read

Leetcode 2364: Count Number of Bad Pairs

You are given a 0-indexed integer array, nums. A pair of indices (i, j) is considered a ‘bad pair’ if i < j and j - i is not equal to nums[j] - nums[i]. Your task is to determine the total number of bad pairs in the array.

Mar 15, 2024 - 4 min read