func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     long long n, x1, y1, x2, y2;     cin >> x1 >> y1;     cin >> x2 >> y2;     cin >> n;     int res = 0;     for (int i = 0; i < n; i++) {       long long a, b, c;       cin >> a >> b >> c;       long long dir1 = a * x1 + b * y1 + c;       long long dir2 = a * x2 + b * y2 + c;       if ((dir1 > 0) != (dir2 > 0)) res++;     }     cout << res << endl;     return 0;   }   