#include <fstream>
using namespace std;
const int N=100000;

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

char s[N+1];
int i=0;

int termen();

int eval()
{
    int r=termen();
    while(s[i]=='+' || s[i]=='-')
    {
        if(s[i]=='+')
        {
            ++i;
            r += termen();
        }
        if(s[i]=='-')
        {
            ++i;
            r -= termen();
        }
    }
   return r;
}

int factor()
{
    int r=0;
    if( s[i]=='(' )
    {
        ++i;
        r = eval();
        ++i;
    }
    else
    {
        while('0'<=s[i] && s[i]<='9')
        {
            r=r*10+(s[i]-'0');
            ++i;
        }
    }
    return r;
}

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

int main()
{
    in >> s;
    out<<eval()<<"\n";
    return 0;
}