#include <fstream>

using namespace std;

ifstream in("evaluare.in");
ofstream out("evaluare.out");

int expresie ();
int factor();
int termen();
int p=0;
char s[100001];
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*=factor();

        }
        else
        {
            p++;
            prod/=factor();
        }
    }
    return prod;
}

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=10*val+s[p]-'0';
        p++;
    }
    return semn*val;
}

int main()
{
    p=0;
    in>>s;
    out<<expresie();
}