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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int a=5,b=6,n=b-a+1;
  6. 	int s=((a+b)*n)>>1;
  7.  
  8. 	cout<<s;
  9. 	return 0;
  10. }
Success #stdin #stdout 0s 3468KB
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11
https://ideone.com/qajF98
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
public

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