#include <bits/stdc++.h> using namespace std; int main( ) { int x,m,n,b,v,c; cin>>x; m=x%10; n=(x-m)/10%10; b=(x-m-n*10)/100%10; v=(x-m-10*n-100*b)/1000%10; c=(x-x%10000)/10000; cout<<m+n+c+v+b; return 0; }