#include<stdio.h>
int isarmstrong (int n)
{
    while (n>0)
    {
        int n;
        int r= n % 10;
        int sum = sum + (r*r*r);
        n = n/10;
    }
    return 0;
}
int main()
{
    int n;
    int sum = 0;
    scanf("%d", &n);
    if(isarmstrong(n))
    {
        printf("Armstrong");
    }
    else if (n < 0)
    {
        printf("Invalid Input");
    }
    return 0;
}