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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int n,a,i,b,sum=0;
  5. 	scanf("%d",&n);
  6. 	a=n;
  7. 	while(a!=1&&a!=4){
  8. 		for(i=a;i>0;i=i/10){
  9. 			b=i%10;
  10. 			sum=sum+b*b;
  11. 		}
  12. 		a=sum;
  13. 		b=0;
  14. 		sum=0;
  15. 	}
  16. 	if(a==1){
  17. 		printf("yes");
  18. 	}
  19. 	else{
  20. 		printf("no");
  21. 	}
  22. 	return 0;
  23. }
  24.  
Success #stdin #stdout 0.01s 5308KB
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stdin
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stdout
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https://ideone.com/SGXoMD
language:
C99 (gcc 8.3)
created:
10 days ago
visibility:
public

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