func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int x1 = 0, y1 = 0, x2 = 0, y2 = 0;     int n = 0;     cin >> x1 >> y1 >> x2 >> y2 >> n;     int count = 0;     for (int i = 0; i < n; ++i) {       int a = 0, b = 0, c = 0;       cin >> a >> b >> c;       int d1 = (a * 1LL * x1 + b * 1LL * y1 + c < 0 ? -1 : 1);       int d2 = (a * 1LL * x2 + b * 1LL * y2 + c < 0 ? -1 : 1);       if ((d1 * 1LL * d2) < 0) ++count;     }     cout << count;     return 0;   }   