#include <fstream>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
int p;
char s[1000001];
int factor();
int expresie();
int termen();
int factor()
{
    int semn=1,val=0;
    while(s[p]=='-')
    {
        semn=-semn;
        p++;
    }
    if(s[p]=='(') {
      p++;
      val=expresie();
      p++;
      return semn*val;
    }
    while(s[p]>='0' && s[p] <= '9')
        val=val*10+s[p++]-'0';
    return semn*val;
}
int expresie()
{
    int sum=termen();
    while(s[p] == '+' || s[p] == '-')
       if(s[p]=='+') { p++; sum+=termen(); }
       else { p++; sum-=termen(); }
    return sum;
}
int termen()
{
    int prod=factor();
    while(s[p]=='*' || s[p] == '/')
       if(s[p]=='*') { p++; prod*=termen(); }
       else { p++; prod/=termen(); }
    return prod;
}
int main()
{
    in.getline(s,1000001);
    out << expresie();
    return 0;
}