func_code_string: #include <bits/stdc++.h>   using namespace std;   struct line {     long long int a, b, c;   };   int main() {     long long int x1, y1, x2, y2;     cin >> x1 >> y1 >> x2 >> y2;     long long int n;     cin >> n;     vector<line> data(n);     for (auto &p : data) {       cin >> p.a >> p.b >> p.c;     }     vector<bool> s1(n), s2(n);     for (int i = 0; i < n; ++i) {       s1[i] = data[i].a * x1 + data[i].b * y1 + data[i].c > 0;       s2[i] = data[i].a * x2 + data[i].b * y2 + data[i].c > 0;     }     int cnt = 0;     for (int i = 0; i < n; ++i) {       cnt += s1[i] ^ s2[i];     }     cout << cnt << endl;     return 0;   }   