#include <fstream>
#define NMAX 100005
using namespace std;

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

char s[NMAX], *p;

int termen();
int factor();

int eval()
{
   int rez=termen();
   while(*p == '+' || *p == '-')
   {
       if(*p=='+')
        p++,rez+=termen();
       else
        p++,rez-=termen();

   }
   return rez;
}

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

int factor()
{
    int rez=0;

    if(*p=='(')
        p++,rez= eval(),p++;
    else
    {
        while(isdigit(*p))
        {
            rez=rez*10+*p-'0';
            p++;
        }
    }
    return rez;

}
int main()
{
    cin >> s;
    p=s;
    cout<<eval();
}