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…

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…

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 Note:Assume we are dealing with an environment which could only store integers within…

题目: 颠倒整数 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 解题: 直接反转,越界处理好炒蛋 Java程序: public class Solution { /** * @param n the integer to be reversed * @return the reversed integer */ public int reverseInteger(int n…

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…

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 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.  …

For an array A, if i < j, and A [i] > A [j], called (A [i], A [j]) is a reverse pair.return total of reverse pairs in A. ExampleGiven A = [2, 4, 1, 3, 5] , (2, 1), (4, 1), (4, 3) are reverse pairs. return 3 这道题跟LeetCode上的那道Count of Smaller Numbers A…