随笔分类 - LeetCode
摘要：A storekeeper is a game in which the player pushes boxes around in a warehouse trying to get them to target locations. The game is represented by an m
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摘要：Given an array nums of integers, we need to find the maximum possible sum of elements of the array such that it is divisible by three. Example 1: Inpu
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摘要：Given a binary tree with the following rules: root.val == 0 If treeNode.val == x and treeNode.left != null, then treeNode.left.val == 2 * x + 1 If tre
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摘要：Given a 2D grid of size m x n and an integer k. You need to shift the grid k times. In one shift operation: Element at grid[i][j] moves to grid[i][j +
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摘要：Given a list of words, list of single letters (might be repeating) and score of every character. Return the maximum score of any valid set of words fo
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摘要：Given a 2D grid consists of 0s (land) and 1s (water). An island is a maximal 4-directionally connected group of 0s and a closed island is an island to
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摘要：Given the following details of a matrix with n columns and 2 rows : The matrix is a binary matrix, which means each element in the matrix can be 0 or
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摘要：There is an m x n matrix that is initialized to all 0's. There is also a 2D array indices where each indices[i] = [ri, ci] represents a 0-indexed loca
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摘要：Given an array nums of positive integers. Your task is to select some subset of nums, multiply each element by an integer and add all these numbers. T
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摘要：Given a string s of '(' , ')' and lowercase English characters. Your task is to remove the minimum number of parentheses ( '(' or ')', in any position
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摘要：Given an array of integers nums and an integer k. A continuous subarray is called nice if there are k odd numbers on it. Return the number of nice sub
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摘要：You are given two strings s1 and s2 of equal length consisting of letters "x" and "y" only. Your task is to make these two strings equal to each other
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摘要：Given a rectangle of size n x m, return the minimum number of integer-sided squares that tile the rectangle. Example 1: Input: n = 2, m = 3 Output: 3
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摘要：You are given an array of strings arr. A string s is formed by the concatenation of a subsequence of arr that has unique characters. Return the maximu
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摘要：Given 2 integers n and start. Your task is return any permutation p of (0,1,2.....,2^n -1) such that : p[0] = start p[i] and p[i+1] differ by only one
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摘要：Given a callable function f(x, y) with a hidden formula and a value z, reverse engineer the formula and return *all positive integer pairs x and y whe
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摘要：We have n jobs, where every job is scheduled to be done from startTime[i] to endTime[i], obtaining a profit of profit[i]. You're given the startTime,
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摘要：You are given a string containing only 4 kinds of characters 'Q', 'W', 'E' and 'R'. A string is said to be balancedif each of its characters appears n
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摘要：Given a list of folders folder, return the folders after removing all sub-folders in those folders. You may return the answer in any order. If a folde
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摘要：You are given an array coordinates, coordinates[i] = [x, y], where [x, y] represents the coordinate of a point. Check if these points make a straight
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