#include <fstream>
#include <cstring>
using namespace std;
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
const int nmax=100000;
char s[nmax+5];
int p;
int expresie();
int termen();
int factor();

int expresie()
{
    int sum=termen();
    while(s[p]=='+' or s[p]=='-')
    {
        if(s[p]=='+')
        {
            p++;
            sum+=termen();
        }
        else
        {
            p++;
            sum-=termen();
        }
    }
    return sum;
}
int termen()
{
    int prod=factor();
    while(s[p]=='*' or s[p]=='/')
    {
        if(s[p]=='*')
        {
            p++;
            prod*=factor();
        }
        else
        {
            p++;
            prod/=factor();
        }
    }
    return prod;
}
int factor()
{
    int val=0,semn=1;
    while(s[p]=='-')
    {
        p++;
        semn*=-1;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while('0'<=s[p] and s[p]<='9')
    {
        val=val*10+s[p]-'0';
        p++;
    }
    return semn*val;
}
int main()
{
    cin.getline(s,nmax+5);
    cout<<expresie();
    return 0;
}
/**
**/