using System;
public class Program
{
public static void Main()
Console.WriteLine("Please enter a number: ");
string num = Console.ReadLine();
int i_num = Convert.ToInt32(num);
int len = num.Length;
int[] nums = new int[len];
int sum = 0;
int count = 0;
while (count < len) {
nums[count] = i_num % 10;
i_num /= 10;
count++;
}
for (int i = 0; i < len; i++)
sum += nums[i];
Console.WriteLine(sum);