백준 3009 C++

#include <iostream>
using namespace std;

int main() {
	int x1, y1, x2, y2, x3, y3, x4, y4;
	cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;

	x4 = x1;
	y4 = y1;
	if (x4 == x2)
		x4 = x3;
	else if (x4 == x3)
		x4 = x2;
	
	if (y4 == y2)
		y4 = y3;
	else if (y4 == y3)
		y4 = y2;

	cout << x4 << " " << y4 << endl;
}