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  1. #include <iostream>
  2. using namespace std;
  3. int main ()
  4. {
  5. int n,sum=0;
  6. cin>>n;
  7. int (i=0;i<=n;++i)
  8. {
  9. 	sum=sum+i;
  10. }
  11. cout<<sum;
  12. return 0;
  13. }
Success #stdin #stdout 0s 3472KB
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stdin
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4 5
stdout
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4*4=16
5*5=25
https://ideone.com/Vs2Emx
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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