func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, a[211111];   int main() {     cin >> n;     for (int i = 0; i < n; i++) {       cin >> a[i];     }     long long l = 0;     long long r = 0;     long long suml = 0;     long long sumr = 0;     for (int i = 0; i < n; i++) {       if (a[i] == 1) {         r++;       }       if (a[i] == 0) {         suml += r;       }     }     for (int i = n - 1; i >= 0; i--) {       if (a[i] == 0) {         l++;       }       if (a[i] == 1) {         sumr += l;       }     }     cout << min(sumr, suml);     return 0;   }   