Feb 7 · 3 min read · Question Design an algorithm to encode a list of strings to a string. The encoded string is then sent over the network and is decoded back to the original list of strings. Machine 1 (sender) has the function: string encode(vector<string> strs) { ...
Join discussionFeb 7 · 2 min read · Question Given an integer array nums and an integer k, return the k most frequent elements within the array. Example 1 Input: nums = [1,2,2,3,3,3], k = 2 Output: [2,3] Example 2 Input: nums = [7, 7], k = 1 Output: [7] Approach In this question, we ha...
Join discussionFeb 4 · 3 min read · Question Given an array of integers nums and an integer target, return the indices i and j such that nums[i] + nums[j] == target and i != j. You may assume that every input has exactly one pair of indices i and j that satisfy the condition. Return th...
Join discussionFeb 3 · 3 min read · Question Given two strings s and t, return true if the two strings are anagrams of each other, otherwise return false. Example 1 Input: s = "racecar", t = "carrace" Output: true Example 2 Input: s = "jar", t = "jam" Output: false Understanding the qu...
Join discussionFeb 2 · 2 min read · Question Given an integer array nums, return true if any value appears more than once in the array, otherwise return false. Example 1 Input: nums = [1, 2, 3, 3] Output: true Example 2 Input: nums = [1, 2, 3, 4] Output: false Understanding the questio...
Join discussionAug 5, 2025 · 4 min read · Problem Statement You are given two arrays fruits and baskets of equal length n. Place fruits into baskets following these rules: Each fruit type must be placed in the leftmost available basket with sufficient capacity Each basket holds only one typ...
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Jul 22, 2025 · 3 min read · Problem Description 1695. Maximum Erasure Value This problem asks us to find the maximum sum of a contiguous subarray where all elements are unique (no duplicates). We need to identify the subarray with unique elements that has the largest sum and ...
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Jul 20, 2025 · 6 min read · Problem Understanding LeetCode 1948-Delete Duplicate Folders in System The goal is to delete all duplicate folder subtrees. Two folders are considered duplicates if they have the same structure and folder names in their subtrees. Solution 1: Standa...
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Jul 19, 2025 · 3 min read · Problem Statement 1233. Remove Sub-Folders from the Filesystem Given an array of folder paths, remove all sub-folders from the filesystem and return the folders after removing all sub-folders in any order. A folder x is a sub-folder of folder y if ...
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