#include <fstream>
#include <cstring>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[100010];
int i,n;
int eval();
int termen();
int factor();
int eval()
{
    int rez=termen();
    while(i<n&&(s[i]=='+'||s[i]=='-'))
    {
        if(s[i]=='+')
        {
            i++;
            rez+=termen();
        }
        else
        {
            i++;
            rez-=termen();
        }
    }
    return rez;
}
int termen()
{
    int rez=factor();
    while(i<n&&(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(i<n&&(s[i]>='0'&&s[i]<='9'))
        {
            rez=rez*10+(s[i]-'0');
            i++;
        }
    }
    return rez;
}
int main()
{
    f>>s;
    n=strlen(s);
    g<<eval();
    return 0;
}