func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n, g;     cin >> n >> g;     g %= 4 * n;     long long xx, yy;     cin >> xx >> yy;     long long x[n], y[n];     for (int(i) = int(0); i < int(n); ++i) cin >> x[i] >> y[i];     for (int(i) = int(1); i < int(g + 1); ++i) {       long long dx = xx - x[(i - 1) % n];       long long dy = yy - y[(i - 1) % n];       xx -= 2 * dx;       yy -= 2 * dy;     }     cout << xx <<     << yy << endl;   }   