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  1. #include<iostream>;
  2. #include <math.h>
  3. using namespace std;
  4. int main() {
  5. 	long long s=0;
  6. 	for ( int i = 3; i < 2019; i+=3){
  7. 		s+=i;
  8. 		if (i%673==0)
  9. 		s-=i;
  10. 	}
  11. for ( int i = 673; i < 2019; i+=673){
  12. 	s+=673;
  13. }
  14. cout << s;
  15. }
  16.  
Success #stdin #stdout 0s 4332KB
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679730
https://ideone.com/7KNz49
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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