随笔分类 - LeetCode
摘要：Given two strings word1 and word2, return the minimum number of operations required to convert word1 to word2. You have the following three operations
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摘要：Given an m x n integer matrix matrix, if an element is 0, set its entire row and column to 0's. You must do it in place. Example 1: Input: matrix = [[
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摘要：Given an array nums with n objects colored red, white, or blue, sort them in-place so that objects of the same color are adjacent, with the colors in
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摘要：Given two strings s and t of lengths m and n respectively, return the minimum window substring of s such that every character in t (including duplicat
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摘要：Given two integers n and k, return all possible combinations of k numbers chosen from the range [1, n]. You may return the answer in any order. Exampl
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摘要：Given an m x n grid of characters board and a string word, return true if word exists in the grid. The word can be constructed from letters of sequent
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摘要：Given an integer array nums sorted in non-decreasing order, remove some duplicates in-place such that each unique element appears at most twice. The r
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摘要：Given an integer array nums sorted in non-decreasing order, remove the duplicates in-place such that each unique element appears only once. The relati
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摘要：There is an integer array nums sorted in non-decreasing order (not necessarily with distinct values). Before being passed to your function, nums is ro
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摘要：There is an integer array nums sorted in ascending order (with distinct values). Prior to being passed to your function, nums is possibly rotated at a
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摘要：Write a function that takes an unsigned integer and returns the number of ’1' bits it has (also known as the Hamming weight). For example, the 32-bit
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摘要：You are given an m x n integer matrix matrix with the following two properties: Each row is sorted in non-decreasing order. The first integer of each
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摘要：Given a rows x cols binary matrix filled with 0's and 1's, find the largest rectangle containing only 1's and return its area. Example 1: Input: matri
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摘要：Given an array of integers heights representing the histogram's bar height where the width of each bar is 1, return the area of the largest rectangle
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摘要：Reverse bits of a given 32 bits unsigned integer. Example 1: Input: 00000010100101000001111010011100 Output: 00111001011110000010100101000000 Explanat
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摘要：Given the head of a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should p
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摘要：We can scramble a string s to get a string t using the following algorithm: If the length of the string is 1, stop. If the length of the string is > 1
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摘要：An n-bit gray code sequence is a sequence of 2n integers where: Every integer is in the inclusive range [0, 2n - 1], The first integer is 0, An intege
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摘要：A message containing letters from A-Z is being encoded to numbers using the following mapping: Given a non-empty string containing only digits, determ
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摘要：Given an integer array nums that may contain duplicates, return all possible subsets (the power set). The solution set must not contain duplicate subs
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