#include <fstream>
#include <string.h>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[1000005];
int i=0;
int termen();
int factor();
int eval()
{
    int rez=termen();
    while(s[i]=='+' || s[i]=='-')
    {
        if(s[i]=='+')
        {
            i++;
            rez+=termen();
        }
        else
        {
            i++;
            rez-=termen();
        }
    }
    return rez;
}
int termen()
{
    int rez=factor();
    while(s[i]=='*' || s[i]=='/')
    {
        if(s[i]=='*')
        {
            i++;
            rez*=factor();
        }
        else
        {
            i++;
            rez/=factor();
        }
    }
    return rez;
}
int factor()
{
    int rez=0;
    if(s[i]=='(')
    {
        i++;
        rez=eval();
        i++;
    }
    else
    {
        while(s[i]>='0' && s[i]<='9')
        {
            rez=rez*10+s[i]-'0';
            i++;
        }
    }
    return rez;
}
int main()
{
    int n;
    f>>s;
    g<<eval();
    return 0;
}