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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() 
  5. {
  6. 	int n = 5;
  7. 	int op_limit = 1;
  8. 	int op_done = 0;
  9. 	bool add = true;
  10. 	int sum = 0;
  11. 	for(int i = 1; i <= n; ++i) {
  12. 	    if(op_done == op_limit) {
  13. 	        op_done = 0;
  14. 	        ++op_limit;
  15. 	        add = !add;
  16. 	    }
  17. 	    sum += (add? i : -i);
  18. 	    ++op_done;
  19. 	}
  20. 	std::cout << sum;
  21. }
Success #stdin #stdout 0s 3296KB
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Standard input is empty
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5
https://ideone.com/kuxkNB
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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