func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     int n, i, j;     cin >> n;     int x[n], y[n];     for (i = 0; i < n; ++i) {       cin >> x[i] >> y[i];     }     long long int c1 = 0, c2 = 0;     std::map<pair<double, double>, int> d;     std::map<double, int> k, pa;     for (i = 0; i < n - 1; ++i) {       for (j = i + 1; j < n; ++j) {         double p, c;         if (x[i] != x[j]) {           p = (y[j] - y[i]) * 1.000 / (x[j] - x[i]);           c = (x[j] * y[i] - x[i] * y[j]) * 1.000 / (x[j] - x[i]);           if (!d[make_pair(p, c)]) {             d[make_pair(p, c)]++;             c1++;             pa[p]++;           }         } else {           if (!k[x[i]]) {             k[x[i]]++;             c2++;           }         }       }     }     long long int ans = 0;     map<double, int>::iterator it;     for (it = pa.begin(); it != pa.end(); ++it) {       ans += (c1 - (it->second)) * (it->second);     }     ans = ans / 2;     for (it = pa.begin(); it != pa.end(); ++it) {       ans += c2 * (it->second);     }     cout << ans <<   n ;     return 0;   }   