#include<bits/stdc++.h> 
using namespace std;
int main()
{
	int n,m;
	cin>>n;
	m=n/1000+n%1000/100+n%1000%100/10+n%1000%100%10+n;
	cout<<m<<endl;
	return 0;
}
/**************************************************************
	Problem: 1617
	User: zhangchenyu
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/