func_code_string: #include <bits/stdc++.h>   using namespace std;   int i, n, k;   double jumlah, x[101], y[101];   int main() {     scanf( %d %d , &n, &k);     for (i = 1; i <= n; ++i) {       scanf( %lf %lf , &x[i], &y[i]);     }     for (i = 1; i < n; ++i) {       jumlah += sqrt(((x[i] - x[i + 1]) * (x[i] - x[i + 1])) +                      ((y[i] - y[i + 1]) * (y[i] - y[i + 1])));     }     jumlah = ((jumlah / 50) * k);     printf( %.9lf n , jumlah);   }   