#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
using ll=long long;
using ull=unsigned long long;
#define pi pair<int, int>
#ifdef LOCAL
#include"D:/Administrator/Documents/vscode/algo/debug.h"
#else
#define debug(...) 42
#endif

//const int N = 2e5 //Lance老师注意改一下数据范围
const int INF = 2e9 + 1000;
const ll INFLL = 8e18 + 1000;
mt19937 mrand(random_device{}());
//模板区域~~~~~~~

//模板结束~~~~~~~

void solve(){
    string s;
    ll ans=0;
    bool sign=false,flag=false;
    stack<bool> st;
    st.push(false);
    cin>>s;
    for(int i=0;i<(int)s.size();i++){
        if(s[i]>='0'&&s[i]<='9'){
            //cout<<(sign^st.top())<<endl;
            ans+=(sign^st.top()?-(s[i]-'0'):s[i]-'0');
        }else if(s[i]=='?'){
            //cout<<(sign^st.top())<<endl;
            ans+=(sign^st.top()?0:9);
        }else if(s[i]=='+'){
            sign=false;
        }else if(s[i]=='-'){
            sign=true;
        }else if(s[i]=='('){
            st.push(sign^st.top());
            sign=false;
        }else if(s[i]==')'){
            st.pop();
        }
        //cout<<'['<<s[i]<<(sign^st.top())<<']';
    }
    //cout<<endl;
    cout<<ans;
}
signed main(){
#ifndef LOCAL
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#endif
#ifdef LOCAL
    freopen("D:/Administrator/Documents/vscode/in.txt","r",stdin);
    freopen("D:/Administrator/Documents/vscode/out.txt","w",stdout);
#endif
    int T = 1;
    //cin >> T;
    while(T--) solve();
}