#include <iostream>

using namespace std;

int main()
{
	int n; 
	int n1;
	int	n2=0;
	
	cout << "Enter an integer: " << endl;
	cin >> n;
		
	for (int i=10; i<n*10; i=i*10)
	{
		n1 = (n%i)/(i/10);
		n2 = n2 + n1;
	
	}
	cout << "Sum of digits is "<< n2 << endl;

 	return 0;
}