#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,g,s,b,q,h;
	cin>>n;
	g=n%10;
	s=n/10%10;
	b=n/100%10;
	q=n/1000;
	h=n+g+s+b+q;
	cout<<h;
	
	
}

/**************************************************************
	Problem: 1617
	User: yangjunwen
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/