#include <iostream>
#include <cstdio>
using namespace std;
struct point{
	int x,y;
 
};
point operator-(point p1){
	point ret;
	ret.x = -p1.x;
	ret.y = -p1.y;
	return ret;
}
point operator-(point p1,point p2){
	point ret;
	ret.x = p1.x - p2.x;
	ret.y = p1.y - p2.y;
	return ret;
}
int main() {
	point p1, p2;
	p1.x = 10, p1.y = 20;
	p2.x = 5, p2.y = 5;
	point p_one = -p1, p_two = p1-p2 ;
	printf("%d %d\n%d %d",p_one.x, p_one.y,p_two.x, p_two.y);
	return 0;
}

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