func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long inf = (long long)1e9;   const long long MOD = (long long)1e9 + 7;   const long long P = 239;   const long long MAX_N = 1000;   const long long CNT = 5;   const long double pi = 3.1415926535897932384626;   const long double eps = 1e-6;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     long long n, l, v1, v2, k;     cin >> n >> l >> v1 >> v2 >> k;     long long cnt = (n + k - 1) / k;     long double f = (long double)(v2 - v1) / (v2 + v1);     long double t = (long double)l / (v2 * cnt - v2 * (cnt - 1) * f);     cout.precision(30);     t = t * cnt + t * f * (cnt - 1);     cout << t;     return 0;   }   