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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.     long long cv,a;
  6.     cin>>cv>>a;
  7.     long long nua_chu_vi = cv/2;
  8.     long long b = nua_chu_vi - a;
  9.     cout<<a*b;
  10.     return 0;
  11. }
  12.  
Success #stdin #stdout 0s 5324KB
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Standard input is empty
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-4404886625906715392
https://ideone.com/KWpI66
language:
C++ (gcc 8.3)
created:
12 hours ago
visibility:
public

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