#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;

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

char* t;
char s[100010];

int eval();
int termen();
int factor();

int nr(char* &cif)
{
    int r=0;
    while(*cif>='0' && *cif<='9')
    {
        r=r*10+*cif-'0';
        cif++;
    }
    return r;
}

int eval()
{
    int r=termen();
    while(*t=='+' || *t=='-')
    {
        if(*t=='+')
        {
            t++;
            r+=termen();
        }
        else
        {
            t++;
            r-=termen();
        }
    }
    return r;
}

int termen()
{
    int r=factor();
    while(*t=='*' || *t=='/')
    {
        if(*t=='*')
        {
            t++;
            r*=factor();
        }
        else
        {
            t++;
            r/=factor();
        }
    }
    return r;
}

int factor()
{
    int r=0;
    if(*t=='(')
    {
        t++;
        r=eval();
        t++;
    }
    else
    {
        r=nr(t);
    }
    return r;
}

int main()
{
    fin.getline(s,100000);
    t=s;
    fout<<eval();
    return 0;
}