#include<stdio.h>

int main()

{

int n,sum=0,temp;

scanf("%d",&n);

temp=n;

while(temp)

{

int a=temp%10;

sum=sum+a*a*a;

temp=temp/10;

}

if(n==sum)

printf("armstrong number");

else

printf("not an armstrong number");

return 0;

}