import java.lang.Boolean;
import java.lang.Integer;

public class Op1 {
	public not() {
		var b = false;
		var c = !b;
		return c;
	}

	public or() {
	    var a = 10;
	    var b = 20;
	    return a | b;
	}

	public and() {
	    var a = 10;
	    var b = 20;
	    return a & b;
	}

    public xor() {
        var a = 10;
        var b = 20;
        return a ^ b;
    }
}