func_code_string: #include <bits/stdc++.h>   using namespace std;   pair<long long, long long> a[200005];   signed main() {     long long n, j;     cin >> n >> j;     j %= 2 * n;     long long x0, y0;     cin >> x0 >> y0;     for (long long i = 0; i < n; i++) {       cin >> a[i].first >> a[i].second;     }     for (long long i = 1; i <= j; i++) {       x0 = 2 * a[(i - 1) % n].first - x0;       y0 = 2 * a[(i - 1) % n].second - y0;     }     cout << x0 <<     << y0;   }   