/*Code by Surya a.k.a Sunny*/
/* by https://www.codechef.com/users/spsc */
#include <bits/stdc++.h>
#define lli long long
#define pi 3.14159265358979323846
#define MOD 1000000007
#define foi(n)  for(lli i=0;i<n;i++)
#define foj(n)  for(lli j=0;j<n;j++)
#define test(T) lli T;cin>>T;while(T--)
#define loop(i, a, b) for(int i = (a); i<= (b); i++)
using namespace std;
int main()
{
  ios_base::sync_with_stdio(false);
   cin.tie(NULL);
   // WAP to check for Armstrong Number
int a,temp,i=0,ans=0,digit=0,power;
scanf("%d",&a);
temp=a;
while(a)
  {
    i++;
    a/=10;
  }
a=temp;
for(int j=1;j<=i;j++)
{
digit=a%10;
power=pow(digit,i);
//cout<<power<<'\n';
ans+=power;
/*power=1;
for(int a=1;a<=i;a++)
  power*=digit;
ans+=power;
*/
a/=10;
}
//cout<<ans;
if(!(ans-temp))
printf("This is an Armstrong number\n");
else
printf("This is not an Armstrong number\n");
}