#include <fstream>

using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
int calcul1();
int calcul2();
int paranteze();
int i;
char sir[100005];
int paranteze()
{
    int r=0;
    if(sir[i]=='(')
    {
        i++;
        r=calcul1();
        i++;
    }
    else
        for(;sir[i]>='0' && sir[i]<='9';i++)
            r=r*10+sir[i]-'0';
    return r;
}
int calcul1()
{
    int r=calcul2();
    while(sir[i]=='+' || sir[i]=='-')
    {
        if (sir[i]=='+')
        {
            i++;
            r+=calcul2();
        }
        else if(sir[i]=='-')
        {
            i++;
            r-=calcul2();
        }
    }
    return r;
}
int calcul2()
{
    int r=paranteze();
    while(sir[i]=='*' || sir[i]=='/')
    {
        if (sir[i]=='*')
        {
            i++;
            r*=paranteze();
        }
        else if(sir[i]=='/')
        {
            i++;
            r/=paranteze();
        }
    }
    return r;
}

int main()
{
    fin.getline(sir,100005);
    fout<<calcul1();
    return 0;
}