#include <iostream> using namespace std; int main(){ int x,sum=0; cin>>x; while (x>0){ sum+=x%10; x/=10; } cout<<sum; return 0; }

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

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#include <iostream> using namespace std; int main() { int n,sum=0; cin>>n; while(n>0){ sum+=n%10; n/=10; } cout<<sum; return 0; }

#include <iostream> using namespace std; int main() { int a,c=0; cin>>a; while(a>0){ c+=a%10; a/=10; } cout<<c; return 0; }

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

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

#include<iostream> using namespace std; int main(){ int x,sum; cin>>x; while(x){ sum+=x%10; x/=10; } cout<<sum; return 0; }

#include<iostream> using namespace std; int main(){ long long a,sum=0; cin>>a; while(a!=0){ sum+=a%10; a/=10; } cout<<sum; return 0; }

#include<iostream> using namespace std; int main(){ int n,s=0; cin>>n; while(n){ s+=n%10; n/=10; } cout<<s; return 0; }