66 - Plus One Given a non-negative number represented as an array of digits, plus one to the number. The digits are stored such that the most significant digit is at the head of the list. Solution 1 : 十进制加法 class Solution { public: vector<int> plusO…

66. 加一 知识点:数组: 题目描述 给定一个由 整数 组成的 非空 数组所表示的非负整数,在该数的基础上加一. 最高位数字存放在数组的首位, 数组中每个元素只存储单个数字. 你可以假设除了整数 0 之外,这个整数不会以零开头. 示例 输入:digits = [1,2,3] 输出:[1,2,4] 解释:输入数组表示数字 123. 输入:digits = [4,3,2,1] 输出:[4,3,2,2] 解释:输入数组表示数字 4321. 输入:digits = [0] 输出:[1] 解法一: 这个…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 数九 采用进位 日期 [LeetCode] 题目地址:https://leetcode.com/problems/plus-one/ Total Accepted: 99274 Total Submissions: 294302 Difficulty: Easy 题目描述 Given a non-empty array of digits repre…

题目: Given a non-negative number represented as an array of digits, plus one to the number. The digits are stored such that the most significant digit is at the head of the list. 提示: 此题其实是模拟我们在小学时候学习的加法进位的操作.难度不大. 代码: 空间复杂度是O(n)的方法: class Solution { p…

Plus One Given a non-negative number represented as an array of digits, plus one to the number. The digits are stored such that the most significant digit is at the head of the list. 从个位数字往前扫,只要一个数字不产生进位,即可加1返回. 如果直到最高位仍有进位,则在数组头部插入1,结果为100…0 解法一: in…

package y2019.Algorithm.str.hard; import java.util.Stack; /** * @ProjectName: cutter-point * @Package: y2019.Algorithm.str.hard * @ClassName: LongestValidParentheses * @Author: xiaof * @Description: 32. Longest Valid Parentheses * * Given a string co…

[LeetCode]Minimum Depth of Binary Tree Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. 递归和非递归,此提比较简单.广度优先遍历即可.关键之处就在于如何保持访问深度. 下面是4种代码: im…

Given an index k, return the kth row of the Pascal's triangle. For example, given k = 3, Return [1,3,3,1]. Note: Could you optimize your algorithm to use only O(k) extra space? 思路:最简单的方法就是依照[Leetcode]Pascal's Triangle 的方式自顶向下依次求解,但会造成空间的浪费.若仅仅用一个vect…

53. Maximum Subarray[leetcode] Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2,1,-3,4,-1,2,1,-5,4],the contiguous subarray [4,-1,2,1] has the largest sum = 6. 挑…

27. Remove Element[leetcode] Given an array and a value, remove all instances of that value in place and return the new length. Do not allocate extra space for another array, you must do this in place with constant memory. The order of elements can b…