func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve();   int arr[200005];   int count1[200005];   int count2[200005];   int main() {     int n;     cin >> n;     for (int i = 0; i < n; i++) {       cin >> arr[i];     }     long long sum1 = 0;     long long sum2 = 0;     int cnt1 = 0;     int cnt2 = 0;     int j = 0;     for (int i = n - 1; i >= 0; i--) {       if (arr[i] == 0) {         cnt1++;       }       count1[i] = cnt1;     }     for (int i = 0; i < n; i++) {       if (arr[i] == 1) {         cnt2++;       }       count2[i] = cnt2;     }     for (int i = 0; i < n; i++) {       if (arr[i] == 1) sum2 += count1[i];     }     for (int i = 0; i < n; i++) {       if (arr[i] == 0) sum1 += count2[i];     }     if (sum1 >= sum2)       cout << sum2 << endl;     else       cout << sum1 << endl;     return 0;   }   