func_code_string: #include <bits/stdc++.h>   int main() {     int n, l, v1, v2, k;     while (~scanf( %d%d%d%d%d , &n, &l, &v1, &v2, &k)) {       if (k >= n) {         printf( %.10lf n , l * 1.0 / v2);         continue;       }       int t = (n - 1) / k;       double s = v2 * 1.0 / v1;       double kk = (1 + s) / (3 + s);       double temp = kk + t * (1 - kk);       temp = l * 1.0 / (temp * v1);       printf( %.10lf n , temp * (kk / s + t * (1 - kk)));     }     return 0;   }   