#include<bits/stdc++.h>
using namespace std;
int main（）{
    int n,a,b,c,y,f,e;
    cin>>n;
    a=n%10;
    b=n/10;
    c=n/100;
    d=n/1000;
    f=n/10000;
    e=a+b+c+d+f;
    cout<<e;
    return 0;
}
/**************************************************************
	Problem: 1418
	User: zhenghaoxuan
	Language: C++
	Result: Compile Error
****************************************************************/