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7. Reverse Integer

时间:2018-01-17 11:27:42      阅读:132      评论:0      收藏:0      [点我收藏+]

标签:within   dea   ali   body   integer   font   res   pre   sign   

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 hold integers within the 32-bit signed integer range. For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.

 

反转一个整数,溢出时返回0

 

C++(26ms):

 1 class Solution {
 2 public:
 3     int reverse(int x) {
 4         long long res = 0 ;
 5         while(x){
 6             res = res*10 + x%10 ;
 7             x /= 10 ;
 8         }
 9         if (res < INT_MIN || res > INT_MAX)
10             return 0 ;
11         else
12             return res ;
13     }
14 };

 

7. Reverse Integer

标签:within   dea   ali   body   integer   font   res   pre   sign   

原文地址:https://www.cnblogs.com/mengchunchen/p/8301507.html

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