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  1. #include<iostream>
  2. using namespace std;
  3. int main()
  4. { int sum=0,n,i=2;
  5.   cin>>n;
  6.   while(i<=n)
  7.   { sum =sum+i;
  8.     i=i+2;
  9. }
  10. cout<<sum;
  11. }
Success #stdin #stdout 0.01s 5616KB
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https://ideone.com/lnuEYi
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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