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  1. #include <iostream>
  2. #include <algorithm>
  3.  
  4. using namespace std;
  5.  
  6. int main() {
  7.     ios_base::sync_with_stdio(false);
  8.     cin.tie(NULL);
  9.  
  10.     long long A, B, K;
  11.     cin>>A>>B>>K;
  12.  
  13.     long long a = 0;
  14.     long long b = 0;
  15. 	if(K>A  || K>B){
  16. 		cout<<0;
  17. 		return 0;
  18. 	}
  19.  
  20.  
  21.     if (A >= K) {
  22.         long long wzdloz_B = B / K;
  23.         long long wzdloz_A = max(0LL, (A / K) - 2);
  24.         a = 2 * wzdloz_B + 2 * wzdloz_A;
  25.     }
  26.  
  27.     if (B >= K) {
  28.         long long wzdloz_A = A / K;
  29.         long long wzdloz_B = max(0LL, (B / K) - 2);
  30.         b = 2 * wzdloz_A + 2 * wzdloz_B;
  31.     }
  32.  
  33.     long long o = max(a, b);
  34.        	if(2*K>A  || 2*K>B){
  35. 		cout<<o/2;
  36. 		return 0;
  37. 	}
  38.  
  39.     cout <<o;
  40.  
  41.     return 0;
  42. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/eweEzi
language:
C++14 (gcc 8.3)
created:
8 hours ago
visibility:
public

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