#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int ans=0; while(n!=0) { ans+=n%10; n/=10; } cout<<ans<<endl; return 0; }
#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int ans=0; while(n!=0) { ans+=n%10; n/=10; } cout<<ans<<endl; return 0; }