#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
void solve(){
    string s;
    cin>>s;
    ll n=s.length();
    s=" "+s;
    ll ans=0;
    for(int i=1;i<=n;i++){
        ll f=1,jl=i;
        if((s[i]>'9'||s[i]<'0')&&s[i]!='?') continue;
        while(jl>=1){
            if(s[jl]=='-') f*=-1;
            jl--;
        }
        if(s[i]=='?'){
            if(f==-1) ans+=0;
            else ans+=9;
        }else ans+=f*(s[i]-'0');

    }
    cout<<ans<<endl;

}
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    return 0;
}