func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, k;     double L, v1, v2;     cin >> n >> L >> v1 >> v2 >> k;     double p = 2 * (n / k - (n % k == 0)) + 1;     printf( %.10f , double(L * (p * v2 + v1)) / double(v2 * (p * v1 + v2)));   }   