func_code_string: #include <bits/stdc++.h>   using namespace std;   string s;   int main() {     long long k, d, t;     scanf( %lld %lld %lld , &k, &d, &t);     if (k % d == 0) {       printf( %.10lf n , (double)t);       return 0;     }     t *= 2;     long long period = (k / d + 1) * d;     long long periodPoints = 2 * k + period - k;     long long nPeriods = t / periodPoints;     long long timeSpent = nPeriods * periodPoints;     long long rest = t - timeSpent;     if (rest == 0) {       printf( %.10lf n , (double)nPeriods * period);       return 0;     }     if (2 * k >= rest) {       printf( %.10lf n , (double)nPeriods * period + rest / 2.0);       return 0;     }     printf( %.10lf n , (double)nPeriods * period + rest - k);   }   