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);

    }

}