随笔分类 - leetcode
摘要:Given two binary trees, write a function to check if they are the same or not. Two binary trees are considered the same if they are structurally ident
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摘要:Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol ValueI 1V 5X 10L 50C 100D 500M 1000For example, two is writt
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摘要:Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Input: 121Output: true
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摘要:Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123Output: 321Example 2: Input: -123Output: -321Example 3: Input: 120Ou
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摘要:There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity sh
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摘要:You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contai
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摘要:Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have ex
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摘要:给定一个字符串,请你找出其中不含有重复字符的 最长子串 的长度。 示例 1: 输入: "abcabcbb"输出: 3 解释: 因为无重复字符的最长子串是 "abc",所以其长度为 3。示例 2: 输入: "bbbbb"输出: 1解释: 因为无重复字符的最长子串是 "b",所以其长度为 1。示例 3:
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摘要:给出两个 非空 的链表用来表示两个非负的整数。其中,它们各自的位数是按照 逆序 的方式存储的,并且它们的每个节点只能存储 一位 数字。 如果,我们将这两个数相加起来,则会返回一个新的链表来表示它们的和。 您可以假设除了数字 0 之外,这两个数都不会以 0 开头。 示例: 输入:(2 -> 4 ->
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摘要:给定一个整数数组 nums 和一个目标值 target,请你在该数组中找出和为目标值的那 两个 整数,并返回他们的数组下标。 你可以假设每种输入只会对应一个答案。但是,你不能重复利用这个数组中同样的元素。 示例: 给定 nums = [2, 7, 11, 15], target = 9 因为 num
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