Solution7.java

/**
 * Created by slade on 2019/5/30.
 */
public class Solution7 {

 //7. Reverse Integer
 public int reverse(int x) {
 int rev = 0;
 while (x != 0) {
 int pop = x % 10;
 x /= 10;

 if (rev > Integer.MAX_VALUE / 10 || (rev == Integer.MAX_VALUE / 10 && pop > 7)) return 0;
 if (rev < Integer.MIN_VALUE / 10 || (rev == Integer.MIN_VALUE / 10 && pop < -8)) return 0;

 rev = rev * 10 + pop;
 }
 return rev;
 }

 public static void main(String[] args) {
 Solution7 s = new Solution7();
 int i = s.reverse(1219);
// System.out.println(i);

 int a = 5;
 a += a *= a %= 3;
 System.out.println(a);

 }

}