func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 10;   int x[N], y[N];   vector<int> xx;   vector<int> yy;   int n;   bool sameline(int tar, int p1, int p2) {     return 1LL * (y[tar] - yy[p1]) * (x[tar] - xx[p2]) ==            1LL * (y[tar] - yy[p2]) * (x[tar] - xx[p1]);   }   bool check(int p1, int p2, int p3, int p4) {     for (int i = 1; i <= n; i++) {       if (!sameline(i, p1, p2) && !sameline(i, p3, p4)) return false;     }     return true;   }   int main() {     int flag;     scanf( %d , &n);     for (int i = 1; i <= n; i++) scanf( %d %d , &x[i], &y[i]);     if (n <= 4) {       printf( YES n );       return 0;     }     xx.push_back(x[1]);     yy.push_back(y[1]);     xx.push_back(x[2]);     yy.push_back(y[2]);     for (int i = 3; i <= n; i++) {       flag = 1;       for (int j = 0; j < xx.size() - 1; j++) {         for (int k = j + 1; k < xx.size(); k++) {           if (1LL * (y[i] - yy[j]) * (x[i] - xx[k]) ==               1LL * (y[i] - yy[k]) * (x[i] - xx[j])) {             flag = 0;             break;           }         }       }       if (flag) {         xx.push_back(x[i]);         yy.push_back(y[i]);       }       if (xx.size() == 4) break;     }     if (xx.size() == 2)       printf( YES n );     else if (xx.size() == 3) {       if (check(0, 1, 1, 2) || check(0, 1, 0, 2) || check(0, 2, 1, 2))         printf( YES n );       else         printf( NO n );     } else {       if (check(0, 1, 2, 3) || check(0, 2, 1, 3) || check(0, 3, 1, 2))         printf( YES n );       else         printf( NO n );     }     return 0;   }   