func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAX_N = 1e5 + 5;   const long long MOD = 1e9 + 7;   const long long INF = 1e9 + 7;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int n, x, y;     cin >> n >> x >> y;     set<double> s;     int count = 0;     while (n--) {       double m;       double a, b;       cin >> a >> b;       a -= x;       b -= y;       if (a != 0) {         m = b / a;         s.insert(m);       } else {         count++;       }     }     cout << (count > 0) + s.size() << endl;   }   