func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, arr[200002], cum[200002];     long long int res = 1000000000000LL, count = 0LL, i, j, m;     scanf( %d , &n);     for (i = 1; i <= n; i++) {       scanf( %d , &arr[i]);     }     for (i = 1; i <= n; i++) {       cum[i] = arr[i];     }     for (i = 2; i <= n; i++) {       cum[i] += cum[i - 1];     }     for (i = 1, j = n; i < n; i++) {       if (arr[i] == 1) {         m = (cum[j] - cum[i + 1]);         count += j - i - m;       }     }     res = min(res, count);     count = 0;     for (i = n; i > 1; i--) {       if (arr[i] == 0) {         count += (cum[i - 1]);       }     }     res = min(res, count);     printf( %I64d n , res);     return 0;   }   