Reverse digits of an integer. Returns 0 when the reversed integer overflows (signed 32-bit integer). Have you met this question in a real interview?     Example Given x = 123, return 321 Given x = -123, return -321 LeetCode上的原题,请参见我之前的博客Reverse Integ…

问题描述 Example1: x = 123, return 321 Example2: x = -123, return -321 原题链接: https://leetcode.com/problems/reverse-integer/ 解决方案 public int reverse(int x) { long res = 0; //need to consider the overflow problem while(x != 0){ res = res * 10 + x % 10; //…

题目: 给定一个整数,求将该整数逆转之后的值: 举例: Example1: x = 123, return 321Example2: x = -123, return -321 解题思路: 在这里只用说明几个要注意的点: 1.  如果该整数是负数,-123,则逆转之后为-321,因此需要从第一位开始逆转,而不是第0位: 2.  如果整数例如:12300,则逆转后为321,而不是00321,因此逆转后,需要去除前面的0: 3.  如果整数例如:2147483647,则逆转后为7463847412…

Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 题意: 给定一个10进制整数,翻转它. Solution1: directly do the simulation. Two tricky parts to be hand…

Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 click to show spoilers. Have you thought about this? Here are some good questions to ask before coding. Bonus points for you if you have already thought throug…

［抄题］: 将一个整数中的数字进行颠倒,当颠倒后的整数溢出时,返回 0 (标记为 32 位整数).   样例 给定 x = 123,返回 321 给定 x = -123,返回 -321 [暴力解法]: 时间分析: 空间分析: [优化后]: 时间分析: 空间分析: ［奇葩输出条件］: ［奇葩corner case］: 负数.末尾有0均可用该方法处理 ［思维问题］: ［一句话思路］: 分离一位数.一边变长 另一边变短 ［输入量］:空: 正常情况:特大:特小:程序里处理到的特殊情况:异常情况(不合法不…

题目等级:Easy 题目描述: Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21    题意:给出一个 32 位的有符号整数,你需要将这个整数中每位上的数字进行反转. 解题思路:   本题很简单,我们给出以下两种方法.  …

题目 Given a 32-bit signed integer, reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123,return -321 Example3: x = 120, return 21 思路 问题的关键在于对溢出的判断. 思路1:用long或者long long 直接用long或者long long计算,这样就保证不会溢出,再判断反转后的数字是否溢出. 思路2:stoi()…

Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 click to show spoilers. Have you thought about this? Here are some good questions to ask before coding. Bonus points for you if you have already thought throu…

Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 click to show spoilers. Have you thought about this? Here are some good questions to ask before coding. Bonus points for you if you have already thought throug…