ABC108B - Ruined Square

問題：B - Ruined Square

#include <iostream>
using namespace std;

int main(void) {
    int x1, x2, y1, y2, a, b;

    cin.tie(0);
    ios::sync_with_stdio(false);
    cin >> x1 >> x2 >> y1 >> y2;
    a = y1 - x1;
    b = y2 - x2;
    cout << y1 - b << " " << y2 + a << " " << x1 - b << " " << x2 + a << "\n";
    return 0;
}