public class Cls {
    public static void main(String[] args) {
        int a = 1 + 2;
        int b = 1 - 2;
        int c = 1 * 2;
        int d = 1 / 2;
        a += 1;
        b -= 2;
        c *= 3;
        d /= 2;
    }
}