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  1. #include <stdio.h>
  2.  
  3. int main()
  4. {
  5. 	int i,n;
  6. long int s;
  7. 	scanf("%d",&n);
  8. 	if(n<=10000)
  9. 	{
  10. 	if(n==1)
  11. 	printf("%d",n);
  12. 	if(n>1)
  13. 	{
  14. 		s=0;
  15. 	for(i=2;i<=n;i++)
  16. 	{
  17.  
  18. 		if(i%2!=0)
  19. 		s=s+1;
  20. 		if(i%2==0)
  21. 		s=s+2;
  22. 	}
  23. 	printf("%ld",s);
  24. 	}
  25. 	}
  26. 	return 0;
  27. }
  28.  
Success #stdin #stdout 0s 9432KB
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stdin
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1000
stdout
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1499
https://ideone.com/EgamLH
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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