#include <stdio.h>
#include <math.h>
int isArmstrong(int n) {
    if(n < 0) {
        return -1;
    }
    int original_n = n;
    int temp = n;
    int digits = 0;
    do {
        temp /= 10;
        digits++;
    }
    whil(temp != 0);
    long long sum = 0;
    temp = n;
    while(temp ! = 0);
    int remainder = temp % 10;
       sum += (long long)pow(remainder,digits);
       temp /= 10;
}
if(sum == original_n){
    return 1;
} else {
    return 0;

}
}
int main() {
    int n;
    if(scanf("%d",&n) != 1) {
        printf("Invalid Input\n");
        return 1;
    }
    int result = isArmstrong(n);
    if(result == -1) {
        printf("Invalid Input\n");
    } else if(result == 1) {
        printf("Armstrong\n");
    } else {
        printf("not Armstrong\n");
    }
    return 0;
}