#include <bits/stdc++.h>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int i=0;
int expresie(string &s);
int termen(string &s);
int factor(string &s);
int numar(string &s);
int expresie(string &s)
{
    int ans=termen(s);
    while(s[i]=='+'||s[i]=='-')
    {
        if(s[i]=='+')
          {i++;
           ans+=termen(s);
          }
        else
          {i++;
           ans-=termen(s);
          }
    }
    return ans;
}
int termen(string &s)
{
    int ans=factor(s);
    while(s[i]=='*'||s[i]=='/')
    {
        if(s[i]=='*')
          {i++;
           ans*=factor(s);
          }
        else
          {i++;
          ans/=factor(s);
          }
    }
    return ans;
}
int factor(string &s)
{
    int ans;
    if(s[i]=='(')
        {i++;
         ans=expresie(s);
         i++;
        }
    else ans=numar(s);
    return ans;
}
int numar(string &s)
{
    int ans=0;
    while(s[i]>='0'&&s[i]<='9')
    {
        ans=ans*10+s[i]-'0';
        i++;
    }
    return ans;
}
int main()
{
    string s;
    fin>>s;
    fout<<expresie(s);
    return 0;
}