func_code_string: #include <bits/stdc++.h>   using namespace std;   int ar[1000009];   int main() {     long long a, s, d, f, g, h, j, k, l;     cin >> a;     k = 0;     for (s = 1; s <= a; s++) {       scanf( %d , &ar[s]);       if (ar[s]) k++;     }     d = 0;     l = 0;     for (s = 1; s <= a; s++) {       if (ar[s] == 1) {         d = d + (a - k - l);       } else         l++;     }     f = 0;     for (s = a; s >= 1; s--) {       if (ar[s] == 0)         f = f + k;       else         k--;     }     cout << min(d, f) << endl;     cout << endl;   }   