题解

#include<bits/stdc++.h>
using namespace std;
string s;
int sum;
int main(){
    cin>>s;
    for(int i=0;i<s.size();i++){
        if(s[i]>='0'&&s[i]<='9') 
            sum+=s[i]-'0';
    }
    cout<<sum;
    return 0;
}