func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:1024000000,1024000000 )   using namespace std;   int main() {     int T, i, j, k, ca = 0, n, m;     int x1, y1, x2, y2;     while (~scanf( %d%d%d%d , &x1, &y1, &x2, &y2)) {       scanf( %d , &n);       int ans = 0, a, b, c;       while (n--) {         scanf( %d%d%d , &a, &b, &c);         long long first = 1LL * a * x1 + 1LL * b * y1 + c,                   second = 1LL * a * x2 + 1LL * b * y2 + c;         if (first > 0 && second < 0)           ans++;         else if (first < 0 && second > 0)           ans++;       }       printf( %d n , ans);     }   }   