题目:Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers can be arbitrarily large and are non-negative. 就是实现大数乘法.嘿嘿,我先用long long直接乘试试手感,试过了不行.所以还是要用字符串表示才行. 我是这样做的,先实现两个子函数,一个是实现一个数和一个字符串的数相乘的结果…

43. 字符串相乘 43. Multiply Strings 题目描述 给定两个以字符串形式表示的非负整数 num1 和 num2,返回 num1 和 num2 的乘积,它们的乘积也表示为字符串形式. LeetCode43. Multiply Strings中等 示例 1: 输入: num1 = "2", num2 = "3" 输出: "6" 示例 2: 输入: num1 = "123", num2 = "456&q…

Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers can be arbitrarily large and are non-negative. class Solution { public: string multiply(string num1, string num2) { } }; 我的解法是每次提取num2的一位,然后…

题目 Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers can be arbitrarily large and are non-negative. 分析 计算两个字符串表示的非负大整数的乘积,结果仍然用字符串表示. 我们都熟悉笔算的整数乘积,按照被乘数逐位与乘数求积,保存进位:当被乘数换位时,结果递增一个数量级,与先前结果求和…

思路:高精度乘法就可以了. 有两个错误以前没在意,1.成员属性定义时候不能进行初始化, vector<); 这样隐性调用了函数进行初始化的形式特别要注意,也是错误的: 2.容器类只有分配了空间时才能用=赋值,否则要用push_back之类函数插入元素. class Solution { public: void add(vector<int>& res, vector<int>& ans, int shift) { ; int i; ;j < shift…

题目:接雨水 难度:hard 题目内容: Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. The above elevation map is represented by array [0,1,0,2,1,0,1,3,2,1,2,1]. In…

这些题目是高精度加法和高精度乘法相关的,复习了一下就做了,没想到难住自己的是C++里面string的用法. 原题地址: 415 Add Strings:https://leetcode.com/problems/add-strings/description/ 67 Add Binary: https://leetcode.com/problems/add-binary/description/ 43 Multiply Strings:https://leetcode.com/problems/…

1. Combination Sum Given a set of candidate numbers (C) (without duplicates) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The same repeated number may be chosen from C unlimited number of times. No…

1 题目 Given two numbers represented as strings, return multiplication of the numbers as a string. Note: The numbers can be arbitrarily large and are non-negative. 接口: public String multiply(String num1, String num2); 2 思路 大整数的乘法,不能够简单用Integer.valueOf(…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 43: Multiply Stringshttps://leetcode.com/problems/multiply-strings/ Given two numbers represented as strings, return multiplication of the numbers as a string.Note: The numbers can be arbit…