Title

Given a 32-bit signed integer x , return the result of inverting the numeric part of x .
Returns 0 if the inverted integer exceeds the range of 32-bit signed integers [−2³¹, 2³¹ − 1] .
Assume that the environment does not allow storage of 64-bit integers (signed or unsigned).

Example 1:
Input: x = 123
Output: 321

Example 2:
Input: x = -123
Output: -321

Example 3:
Input: x = 120
Output: 21

Example 4:
Input: x = 0
Output: 0

Hint:
-2³¹<= x <= 2³¹ - 1

Code

package tencent50;public class leetcode7 {// The key is to judge whether it exceeds the intervalpublic int reverse(int x) {long ans = 0;while (x != 0){ans = ans * 10 + x % 10;x /= 10;}return ans==(int)ans ? (int) ans : 0;}public static void main(String[] args) {leetcode7 obj = new leetcode7();System.out.println(obj.reversespan>(1534236469));}}