func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long n, m, dx, dy, ans = 0, a, b;     map<long long, int> num;     double k;     scanf( %lld%lld%lld%lld , &n, &m, &dx, &dy);     long long x, y;     for (int i = 0; i < m; i++) {       scanf( %lld%lld , &x, &y);       k = ((dy * x - dx * y) % n + n) % n;       num[k]++;       if (ans < num[k]) {         a = x;         b = y;         ans = num[k];       }     }     printf( %lld %lld n , a, b);     return 0;   }   