public class Solution { public int reverse(int x) { // Start typing your Java solution below // DO NOT write main() function int k = Math.abs(x); int r = 1; int ans = 0; while(k>=10){ // !!!!!! r = k%10; ans *=10; ans += r; k/=10; } ans *=10; ans +=k; if(x<0) ans = -ans; return ans; } }