#include<stdio.h>
int main(){
    int num,temp,rem,sum=0;
    scanf("%d",&num);
    temp=num;
    while(temi!=0){
        rem=temp%10;
        sum=sum+(rem*rem*rem);
        temp=temp/10;
    }
    if(sum==num)
    printf("armstrong number");
    else
    printf("not a armstrong number");
    return 0;
}