#include <fstream>

#define nMax 100003
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char S[nMax];
char *p=S;

int termen();
int factor();
int expresie();

int factor()
{
    int ans=0;
    if(*p=='(')
    {
        p++;
        ans=expresie();
        p++;
    }
    else
    {
        while(*p>='0' && *p<='9')
        {
            ans=ans*10+*p-'0';
            p++;
        }
    }

    return ans;
}
int termen()
{
    int ans=factor();
    while(*p=='*' || *p=='/')
    {
        if(*p=='*')
        {
            p++;
            ans*=factor();
        }
        else
        {
            p++;
            ans/=factor();
        }
    }

    return ans;
}
int expresie()
{
    int ans=termen();
    while(*p=='+' || *p=='-')
    {
        if(*p=='+')
        {
            p++;
            ans+=termen();
        }
        else
        {
            p++;
            ans-=termen();
        }
    }

    return ans;
}
int main()
{
    fin>>S;
    fout<<expresie();
    return 0;
}