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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 		int a[34],i,j,count=0,sosuu=0;
  5.  
  6. 	a[0]=2;
  7. 	a[1]=-1;
  8.  
  9. 	for(i=0;i<32;i++){
  10. 		a[i+2]=-a[i+1]+a[i]+2;
  11. 	}
  12. 	for(i=0;i<=32;i++){
  13. 		if(a[i]>1){
  14. 			count=0;
  15. 	for(j=1;j<=a[i];j++){
  16. 		if(a[i]%j==0){
  17. 			count++;
  18. 	}
  19. 	}
  20. 	if(count==2){
  21. 		sosuu++;
  22. 	}
  23. 	}
  24. 	}
  25. 		printf("%d",sosuu);
  26. 	return 0;
  27. }
  28.  
Success #stdin #stdout 0.03s 5324KB
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7
https://ideone.com/APUAuG
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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