func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long int k, d, t;     cin >> k >> d >> t;     long long int k1, k2;     k1 = k;     k2 = (k / d) * d + (int)(k % d != 0) * d - k;     t *= 2;     long long int bal = 2 * k1 + k2;     long long int n = t / bal;     double time = n * (k1 + k2);     double extra = 1 - ((double)n / (double)t) * (double)bal;     double work_done_by_k1 = 2 * (double)k1 / (double)t;     double work_done_by_k2 = (double)k2 / (double)t;     if (extra > work_done_by_k1) {       time += (k1 + (double)(extra - work_done_by_k1) * (double)t);     } else {       time += (double)extra * (double)t / 2;     }     printf( %f n , time);   }   