#include<bits/stdc++.h>
using namespace std;
#define int long long
int cal(string s)
{
    int len=s.length();

    stack<char>op;
    string ex;
    ex.clear();
    for(int i=0;i<len;i++)
    {
        if(s[i]>='0' && s[i]<='9')ex.push_back(s[i]);
        else
        {
            if(op.empty())op.push(s[i]);
            else if(s[i]=='(')op.push(s[i]);
            else if(s[i]=='+'||s[i]=='-')
            {
                if(op.top()!='(')
                {
                    ex.push_back(op.top());
                    op.pop();
                    op.push(s[i]);
                }
                else
                {
                    op.push(s[i]);
                }
            }
            else if(s[i]==')')
            {
                while(op.top()=='+'||op.top()=='-')
                {
                    ex.push_back(op.top());
                    op.pop();
                }
                
                op.pop();
            }
        }
        // cout<<ex<<endl;
    }
    while(op.size())ex.push_back(op.top()),op.pop();
    // cout<<ex<<endl;

    len=ex.size();
    stack<int>num;
    for(int i=0;i<len;i++)
    {
        if(ex[i]>='0'&&ex[i]<='9')
        {
            num.push((ex[i]-'0'));
        }
        else
        {
            int b=num.top();
            num.pop();
            int a=num.top();
            num.pop();
            int t;
            if(ex[i]=='+')t=a+b;
            else t=a-b;
            num.push(t);
        }
    }
    // cout<<num.top()<<endl;
    return num.top();
}

signed main()
{
    string s;
    cin>>s;
    int len=s.length();
    int pos[3],cnt=0;
    for(int i=0;i<len;i++)
    {
        if(s[i]=='?')
        {
            cnt++;
            pos[cnt]=i;
        }
    }
    if(cnt==0)
    {
        cout<<cal(s);
    }
    if(cnt==1)
    {
        string st;
        st=s;
        st[pos[1]]='9';
        int ans=cal(st);
        st[pos[1]]='0';
        ans=max(ans,cal(st));

        // cout<<st<<endl;
        cout<<ans;
    }
    if(cnt==2)
    {
        string st;
        st=s;
        st[pos[1]]='0';
        st[pos[2]]='0';
        // cout<<st<<endl;
        int ans=cal(st);
        

        st[pos[1]]='0';
        st[pos[2]]='9';
        // cout<<st<<endl;
        ans=max(ans,cal(st));
        

        st[pos[1]]='9';
        st[pos[2]]='0';
        // cout<<st<<endl;
        ans=max(ans,cal(st));
        
        
        st[pos[1]]='9';
        st[pos[2]]='9';
        // cout<<st<<endl;
        ans=max(ans,cal(st));
        cout<<ans;
    }
    // system("pause");
    return 0;
}