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  1. #include <stdio.h>
  2.  
  3. int main() {
  4. 	int a=1, b=2, c, i, count=0;
  5. 		for(i=1; c<=1000; i++){
  6. 			c=3*b+2*a;
  7. 			b=c; 
  8. 			a=b;
  9. 		if(c>=100&&c<=1000){
  10. 			count++;
  11. 		}
  12. 		}
  13. printf("%d",count);
  14. 	return 0;
  15. }
  16.  
Success #stdin #stdout 0s 5308KB
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https://ideone.com/O67Lr7
language:
C (gcc 8.3)
created:
212 days ago
visibility:
public

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