Reverse Integer

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 the 32-bit signed integer range: [−231, 231 − 1]. For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.

Input:
1534236469
Output:
1056389759
Expected:
0

assume that your function returns 0 when the reversed integer overflows.

• [x] if (ans > Integer.MAX_VALUE || ans < Integer.MIN_VALUE) { return 0; }

class Solution {
    public int reverse(int x) {
        long ans = 0;
        while (x != 0) {
            ans = ans * 10 + x % 10;
            x = x / 10;
            if (ans > Integer.MAX_VALUE || ans < Integer.MIN_VALUE) {
                return 0;
            }
        }
        return (int)ans;
    }
}