#include <stdio.h>

int main() {
    int n, sum = 0, temp;

    printf("Enter a number: ");
    scanf("%d", &num);

    while (n != 0) 
    {
        temp = n% 10;     
        sum += temp;         
        n /= 10;            
    }

    printf("%d", sum);
    return 0;
}