#include<bits/stdc++.h> using namespace std; int main(){ /**cout<<17/3<<endl; cout<<18.0/4<<endl; cout<<-17/3<<endl; cout<<17%3<<endl; cout<<-17%4<<endl; cout<<4567%100; int a = 2,b = 3,c = 4; cout<<a*b+c<<endl; cout<<a*(b+c)<<endl; cout<<(1+b)*c<<endl; cout<<a*a*b*b; int N,M; cin>>N; cin>>M; cout<<(N+M)*2<<" "<<N*M; **/ int n,a,b,c; cin>>n; a = n%10; b = n/10%10; c = n/100; cout<<a+b+c; return 0; }