func_code_string: #include <bits/stdc++.h>   using namespace std;   long long a, b, c;   int n;   long long X1, Y1, X2, Y2;   long long sign(long long a) {     if (a > 0) return 1;     if (a < 0) return -1;     return 0;   }   int main() {     cin >> X1 >> Y1 >> X2 >> Y2;     cin >> n;     int ans = 0;     for (int i = 0; i < n; ++i) {       cin >> a >> b >> c;       if (sign(a * X1 + b * Y1 + c) != sign(a * X2 + b * Y2 + c)) ans++;     }     cout << ans;     return 0;   }   