func_code_string: #include <bits/stdc++.h>   using namespace std;   vector<int> arr;   int n, k;   long long sum[5500];   double mx = -1e9;   int main() {     cin >> n >> k;     for (int x, i = 1; i <= n; i++) {       cin >> x;       arr.push_back(x);       sum[i] = sum[i - 1] + x;     }     for (int i = 1; i <= n; i++) {       for (int j = i + k - 1; j <= n; j++) {         mx = max(mx, (sum[j] - sum[i - 1]) / (double(j - i + 1)));       }     }     printf( %0.15lf , mx);   }   