#include <bits/stdc++.h>   using namespace std;   int Ans[1001], A[1001], B[1001], C[1001], D[1001], E[1001];   int value(int Arr[], int i, int j, int k) {     return (Arr[j] - Arr[i]) * (Arr[k] - Arr[i]);   }   int main() {     int n;     cin >> n;     for (int i = 0; i < n; i++) {       cin >> A[i] >> B[i] >> C[i] >> D[i] >> E[i];     }     int index = 0;     for (int i = 0; i < n; i++) {       for (int j = 0; j < n; j++) {         if (j != i) {           for (int k = 0; k < n; k++) {             if (k != i && k != j) {               if ((value(A, i, j, k) + value(B, i, j, k) + value(C, i, j, k) +                    value(D, i, j, k) + value(E, i, j, k)) > 0) {                 Ans[i] = -1;                 break;               }             }           }         }       }     }     int count = 0;     for (int i = 0; i < n; i++) {       if (Ans[i] != -1) {         count++;       }     }     cout << count << endl;     for (int i = 0; i < n; i++) {       if (Ans[i] != -1) {         cout << i + 1 << endl;         count++;       }     }     return 0;   }   