#include <fstream>
using namespace std;
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
int i;
char s[100005];
int expresie();
int termen();
int factor();
int constanta();
int expresie()
{
    int r=termen();
    while(s[i]=='+' || s[i]=='-')
    {
        if(s[i]=='+'){
            i++;
            r+=termen();
        }
        else
        {
            i++;
            r-=termen();
        }
    }
    return r;
}

int termen()
{
    int r=factor();
    while(s[i]=='*' || s[i]=='/')
    {
        if(s[i]=='*')
        {
            i++;
            r*=factor();
        }
        else
        {
            i++;
            r/=factor();
        }
    }
    return r;
}

int factor()
{
    int r;
    if(s[i]=='('){
        i++;
        r=expresie();
        i++;
    } else
    r=constanta();
    return r;
}

int constanta()
{
    int r=0;
    while(s[i]>='0' && s[i]<='9')
    {
        r=r*10+s[i]-'0';
        i++;
    }
    return r;
}

int main()
{
    cin>>s;
    i=0;
    cout<<expresie();
}