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  1. #include <stdio.h>
  2. int main(void) {
  3.     int a[30];
  4.     int n=0;
  5.     a[0]=2;
  6.     a[1]=-1;
  7.     while(a[n]<=5000){
  8.     	a[n+2]=-a[n+1]+a[n]+2;
  9.     	n++;
  10.     }
  11.     printf("%d",n);
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 0.01s 5276KB
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18
https://ideone.com/UjCdhN
language:
C99 (gcc 8.3)
created:
188 days ago
visibility:
public

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