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  1. #include <stdio.h>
  2. int main()
  3. {
  4. int a[50], i,sum=0;
  5.     a[0]=2;a[1]=-1;
  6. for (i=2; i<33; i++)
  7. a[i]=-a[i-1]+a[i-2]+2;
  8.  
  9. for(i=0; i<33; i++){
  10. if(i%4==0)
  11.  sum=sum+a[i];
  12. }
  13. printf("%d",sum);
  14. return 0;
  15. }
  16.  
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/I35bCk
language:
C (gcc 8.3)
created:
28 days ago
visibility:
public

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