#include <fstream>
using namespace std;
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
char s[100005];
int ind;
int expresie();
int termen();
int factor();
int numar();

int expresie()
{
    int x=termen();
    while(s[ind]=='+'||s[ind]=='-')
    {
        if(s[ind]=='+')
        {
            ind++;
            x=x+termen();
        }
        else if(s[ind]=='-')
        {
            ind++;
            x=x-termen();
        }
    }
    return x;
}
int termen()
{
    int y=factor();
    while(s[ind]=='*'||s[ind]=='/')
    {
        if(s[ind]=='*')
        {
            ind++;
            y=y*factor();
        }
        else if(s[ind]=='/')
        {
            ind++;
            y=y/factor();
        }
    }
    return y;
}
int factor()
{
    int nr;
    if(s[ind]=='(')
    {
        ind++;
        nr=expresie();
        ind++;
    }
    else nr=numar();
    return nr;
}
int numar()
{
    int z=0;
    while(s[ind]>='0'&&s[ind]<='9')
    {
        int cif=s[ind]-'0';
        z=z*10+cif;
        ind++;
    }
    return z;
}
int main()
{cin.getline(s,100005);
cout<<expresie();
    return 0;
}