func_code_string: #include <bits/stdc++.h>   using namespace std;   long long c1, c2;   int n, k;   long long p(long long m) {     long long mini = LLONG_MAX;     for (int i = 1; i <= n; ++i)       if ((n + i) / (i + 1) <= m and m <= n / i)         mini = min(mini, 1LL * i * i * (m * (i + 1) - n) +                              1LL * (i + 1) * (i + 1) * (n - m * i));     return m * (c1 + c2) - 2 * c2 * n + c2 * mini;   }   int main() {     scanf( %d %lld %lld%*c , &n, &c1, &c2);     for (int i = 0; i < n; ++i) k += getchar() ==  1 ;     int lo = 1, hi = k;     while (lo < hi) {       int mid = lo + (hi - lo) / 2;       if (p(mid) <= p(mid + 1))         hi = mid;       else         lo = mid + 1;     }     printf( %lld n , p(lo));     return 0;   }   