#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() using namespace std; int main(){ /* int a; cin>>a; if(a>=60){ cout<<"YES"; }else{ cout<<"NO"; } */ /* int a; cin>>a; cout<<4-a%4; return 0; */ int a,sum=0,i; cin>>a; for(i=1;i<=5;i++){ sum+=a%10; a=a/10; } cout<<sum; }