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  1. #include<bits/stdc++.h>
  2. #define int long long
  3. using namespace std;
  4. int32_t main()
  5. {
  6.     cin.tie(0);
  7.     cout.tie(0);
  8.     ios::sync_with_stdio(false);
  9.     int t=1;
  10.     //cin>>t;
  11.     while(t--)
  12.     {
  13.          int a,b;
  14.          cin>>a>>b;
  15.          cout<<(a*b)/2;
  16.     }
  17.     return 0;
  18. }
  19.  
Success #stdin #stdout 0.01s 5316KB
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729071444955337216
https://ideone.com/z8eXRj
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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