#include <stdio.h>

int main() {
    int num=923;
    int rem,sum;
    while (num !=0){
        rem=num%10;
        sum=sum+rem;
        
        while(num>10){
            rem=num%10;
            sum=sum+rem;
            num=num/10;
        }
        num=num;    
    }
    printf("%d",sum);
    if(printf("hello")){
        
    }
    return 0;
}