func_code_string: #include <bits/stdc++.h>   using namespace std;   int xx[8] = {0, 0, 1, -1, 1, -1, 1, -1};   int yy[8] = {-1, 1, 0, 0, 1, -1, -1, 1};   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     ;     long long int n;     cin >> n;     bool flag = true;     vector<long long int> v(n);     for (long long int i = 0; i < n; i++) cin >> v[i];     long long int pos1 = -1, pos2 = -1;     for (long long int i = 0; i < n; i++) {       if (v[i] == 1) {         pos1 = i;         break;       }     }     if (pos1 == -1) {       cout <<  0 ;       return 0;     }     for (int j = n - 1; j >= 0; j--) {       if (v[j] == 1) {         pos2 = j;         break;       }     }     long long int c = 1, ans = 1;     if (pos1 == pos2) {       cout << 1 <<   n ;       return 0;     } else {       for (long long int i = pos1; i < pos2 + 1; i++) {         if (v[i] == 0) {           c++;         } else {           ans *= c;           c = 1;         }       }       cout << ans <<   n ;     }     return 0;   }   