#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int a,b,c,d,e; a=n%10; n=n/10; b=n%10; n=n/10; c=n%10; n=n/10; d=n%10; n=n/10; e=n%10; cout<<a+b+c+d+e; return 0; }