func_code_string: #include <bits/stdc++.h>   using namespace std;   map<double, int> Freq;   int main() {     double N;     double W;     scanf( %lf%lf , &N, &W);     vector<double> vec;     for (int i = 0; i < N * 2; i++) {       double a;       scanf( %lf , &a);       vec.push_back(a);     }     sort((vec).begin(), (vec).end());     double ans = min(vec[0] * 1.0, vec[(int)(N + 1e-9)] / 2.0);     ans = min(ans, W * 1.0 / (N * 3.0));     printf( %.9lf n , 3 * N * ans);     return 0;   }   