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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int i,a[50];
  5. 	a[0]=2;
  6. 	a[1]=-1;
  7. 	for(i=2;i<=30;i++)
  8. 		{
  9. 		a[i]=-a[i-1]+a[i-2]+2;
  10. 		}
  11. 	printf("%d",a[30]);
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 0s 5460KB
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2496122
https://ideone.com/QcrtAS
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language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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