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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int A[4]={-1,-3,5,7};
  6.  
  7. 	for(int a=0;a<4;a++) A[a]+=a*(a+1)/2;
  8. 	int ans = 0;
  9. 	for(int i=0; i<4; i+=1) ans += A[i];
  10. 	cout<<ans;
  11. 	return 0;
  12. }
Success #stdin #stdout 0.01s 5300KB
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Standard input is empty
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18
https://ideone.com/rOk36X
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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