#include <fstream>
#include <cstring>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[100003];
int i;
int termen();
int factor();
int constanta();
int expresie();
int constanta()
{
    int r=0;
    while(s[i]>='0'&&s[i]<='9')
    {
        r=r*10+(s[i]-'0');
        i++;
    }
    return r;
}
int expresie()
{
    int r=termen();
    while(s[i]=='+'||s[i]=='-')
        if(s[i]=='+')
        {
            i++;
            r+=termen();
        }
        else
        {
            i++;
            r-=termen();
        }
    return r;
}
int termen()
{
    int r=factor();
    while(s[i]=='*'||s[i]=='/')
        if(s[i]=='*')
        {
            i++;
            r*=factor();
        }
        else
        {
            i++;
            r/=factor();
        }
    return r;
}
int factor()
{
    int r;
    if(s[i]=='(')
    {
        i++;
        r=expresie();
        i++;
    }
    else
        r=constanta();
    return r;
}
int main()
{
    f>>s;
    i=0;
    g<<expresie();
    return 0;
}