Help me in solving LPYAS151 problem

help
,
1

My issue

solve the problem

My code

#include <stdio.h>

int main() {
    int num, originalNum, remainder, result = 0;

    printf("Enter a three-digit integer: ");
    scanf("%d", &num);

    // Check if the number is three digits
    if (num < 100 || num > 999) {
        printf("%d is not a three-digit number.\n", num);
        return 1; // Exit if the number is not three digits
    }

    originalNum = num;

    // Calculate the sum of the cubes of its digits
    while (originalNum != 0) {
        remainder = originalNum % 10;
        result += remainder * remainder * remainder;
        originalNum /= 10;
    }

    // Check if the result is equal to the original number
    if (result == num)
        printf("%d is an Armstrong number.\n", num);
    else
        printf("%d is not an Armstrong number.\n", num);

    return 0;
}

Learning course: Algorithmic Problem Solving
Problem Link: https://www.codechef.com/learn/course/klu-problem-solving/KLUPS00A/problems/LPYAS151