func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[11][5];   bool ok(int l, int j, int k) {     int i, an = 0;     for (i = 0; i < 5; i++) {       an = an + (a[j][i] - a[l][i]) * (a[k][i] - a[l][i]);     }     if (an > 0) return false;     return true;   }   int main() {     ios::sync_with_stdio(false);     int i, j, k, n;     cin >> n;     if (n > 11) {       n *= 5;       while (n--) cin >> i;       cout << 0;     } else {       for (i = 0; i < n; i++)         cin >> a[i][0] >> a[i][1] >> a[i][2] >> a[i][3] >> a[i][4];       vector<int> v;       k = n;       j = n;       for (i = 0; i < n; i++) {         k = n;         for (j = 0; j < n && k == n; j++)           for (k = j + 1; k < n; k++) {             if (!ok(i, j, k)) {               break;             }           }         if (j == n && k == n) v.push_back(i + 1);       }       cout << v.size() << endl;       for (i = 0; i < v.size(); i++) cout << v[i] <<     << endl;       ;     }     return 0;   }   