#include <iostream>
#include <string>
#include <fstream>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
const int n=100001;
int p;
string sir;
int expresie();
int termen();
int factor();
 
int expresie()
{
    int sum=termen();
    while(sir[p]=='+' || sir[p]=='-')
    {
        if(sir[p]=='+')
        {
            p++;
            sum+=termen();
        }
 
        else
        {
            p++;
            sum-=termen();
        }
    }
    return sum;
}
 
int termen()
{
    int produs=factor();
    while(sir[p]=='*' || sir[p]=='/')
    {
        if(sir[p]=='*')
        {
            p++;
            produs*=factor();
        }
        else
        {
            p++;
            produs/=factor();
        }
    }
    return produs;
}
 
int factor()
{
    int semn=1, val=0;
    while(sir[p]=='-')
    {
        p++;
        semn=-semn;
    }
    if(sir[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(isdigit(sir[p]))
    {
        val=val*10+(sir[p]-'0');
        p++;
    }
    return semn*val;
}
 
int main ()
{
    getline(fin,sir);
    fout<<expresie();
    return 0;
}