제출 #115434

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
115434	2019-06-07 13:26:52	youngyojun	Cooking (innopolis2018_final_B)	C++11	100 / 100	3 ms	384 KiB

B

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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
ll K, D, T, N, L, Ans;
 
int main() {
  cin >> K >> D >> T; T <<= 1;
  N = (K+D-1) / D;
  L = N*D + K;
  Ans += N*D * (T/L);
  T %= L;
  if(T <= K*2) Ans += T/2;
  else { Ans += T-K; T = 0; }
  cout << Ans << "." << ((T&1) ? "5" : "0") << endl;
  return 0;
}
 
 
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