#include <fstream>

using namespace std;

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

int expresie(),termen(),factor(),p;
char s[100001];


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

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]=='-')
    {
        p++;
        semn=-semn;
    }

    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++; //paranteza inchisa
    }
    while(s[p]>='0'&&s[p]<='9')

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

    return semn*val;

}