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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. typedef long long ll;
  4. #define el << "\n"
  5.  
  6. int main() {
  7. ios::sync_with_stdio(false);
  8. cin.tie(nullptr);
  9. cout.tie(nullptr);
  10.   ll n,m,a;
  11.   cin>>n>>m>>a;
  12.   cout<<((n+a-1)/a)*((m+a-1)/a);
  13.   return 0;
  14. }
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/QIl3o0
language:
C++14 (gcc 8.3)
created:
6 days ago
visibility:
public

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