leetcode Reverse Integer
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题目
Reverse digits of an integer.
Example1: x = 123, return 321
Example2: x = -123, return -321
取余运算
public class Solution { public int reverse(int x) { int flag=1; if(x<0){ flag=-1; x=-x; } int ret=0; while(x>0){ ret=ret*10+x%10; x/=10; } return ret*flag; }}
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