随笔分类 - Leetcode
摘要：Given two strings s and p, return an array of all the start indices of p's anagrams in s. You may return the answer in any order. An Anagram is a word
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摘要：Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: nums = [1,2,3,4,5,6,7], k = 3 Output: [5,6,7,1,2,
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摘要：Given two binary search trees root1 and root2, return a list containing all the integers from both trees sorted in ascending order. Example 1: Input:
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摘要：Given an array of integers arr, return true if and only if it is a valid mountain array. Recall that arr is a mountain array if and only if: arr.lengt
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摘要：We define the usage of capitals in a word to be right when one of the following cases holds: All letters in this word are capitals, like "USA". All le
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摘要：An integer has sequential digits if and only if each digit in the number is one more than the previous digit. Return a sorted list of all the integers
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摘要：There are n gas stations along a circular route, where the amount of gas at the ith station is gas[i]. You have a car with an unlimited gas tank and i
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摘要：Koko loves to eat bananas. There are n piles of bananas, the ith pile has piles[i] bananas. The guards have gone and will come back in h hours. Koko c
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摘要：There are some spherical balloons taped onto a flat wall that represents the XY-plane. The balloons are represented as a 2D integer array points where
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摘要：You are given the root node of a binary search tree (BST) and a value to insert into the tree. Return the root node of the BST after the insertion. It
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摘要：ou are given the root of a binary tree where each node has a value 0 or 1. Each root-to-leaf path represents a binary number starting with the most si
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摘要：最近事情比较多，耽误了。。。。。。 Given two binary strings a and b, return their sum as a binary string. Example 1: Input: a = "11", b = "1" Output: "100" Example 2:
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摘要：The complement of an integer is the integer you get when you flip all the 0's to 1's and all the 1's to 0's in its binary representation. For example,
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摘要：In a town, there are n people labeled from 1 to n. There is a rumor that one of these people is secretly the town judge. If the town judge exists, the
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摘要：You are given a list of songs where the ith song has a duration of time[i] seconds. Return the number of pairs of songs for which their total duration
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摘要：Given the root of a binary tree, find the maximum value v for which there exist different nodes a and b where v = |a.val - b.val| and a is an ancestor
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摘要：Given a positive integer k, you need to find the length of the smallest positive integer n such that n is divisible by k, and n only contains the digi
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摘要：Given the head of a singly linked list, return the middle node of the linked list. If there are two middle nodes, return the second middle node. Examp
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摘要：Given a string s representing a valid expression, implement a basic calculator to evaluate it, and return the result of the evaluation. Note: You are
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摘要：Given a string s which represents an expression, evaluate this expression and return its value. The integer division should truncate toward zero. You
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