func_code_string: #include <bits/stdc++.h>   using namespace std;   const int oo = 0x3f3f3f3f;   const double eps = 1e-9;   const int maxn = 100010;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     int n, k;     double l, v1, v2;     cin >> n >> l >> v1 >> v2 >> k;     int t = (n + k - 1) / k;     if (t == 1) {       cout.precision(17);       cout << fixed << l / v2 <<   n ;     } else {       double y = l * (1 + v2 / v1) / (2.0 * t - 1 + v2 / v1);       double x = l - y;       double a = y / v2 + x / v1;       cout.precision(17);       cout << fixed << a <<   n ;     }     return 0;   }   