#include <stdio.h>
#include <math.h>

int main() {
    int num, a,r, n = 0;
    double result = 0.0;
    printf("Enter an integer: ");
    scanf("%d", &num);
    a = num;
    while (a != 0) {
        a /= 10;
        ++n;
    }
   a = num;
    while (a!= 0) {
        r = a % 10;
        result += pow(r, n);
        a /= 10;
    }

    if ((int)result == num) {
        printf("%d is an Armstrong number.\n", num);
    } else {
        printf("%d is not an Armstrong number.\n", num);
    }

    return 0;
}