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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int a[50],i,sum=0;//多めに要素を確保
  5. 	a[0]=0; a[1]=-1;
  6. 	for(i=2;i<32;i++)
  7. 	{	a[i]=-a[i-1]+a[i-2]+2;
  8. 		//if(i%4==0)
  9. 	    	}sum=sum+a[4*i];
  10.  
  11. 	    	printf("%d",sum);
  12.  
  13. 	return 0;
  14. }
  15.  
Success #stdin #stdout 0.01s 5360KB
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-1802969148
https://ideone.com/pEgYeC
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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