#include<fstream>
#include<cstring>
using namespace std;
int p;
char v[100001];
int expr();
int term();
int fact();
int expr()
{
    int rez=term();
    while(v[p]=='-' || v[p]=='+')
    {
        if(v[p]=='+')
        {
            p++;
            rez+=term();
        }
        if(v[p]=='-')
        {
            p++;
            rez-=term();
        }
    }
    return rez;
}
int term()
{
    int rez=fact();
    while(v[p]=='*' || v[p]=='/')
    {
        if(v[p]=='*')
        {
            p++;
            rez=rez*fact();
        }
        if(v[p]=='/')
        {
            p++;
            rez=rez/fact();
        }
    }
    return rez;
}
int fact()
{
    int semn=1,val=0;
    if(v[p]=='-')
    {
        semn=-semn;
        p++;
    }
    if(v[p]=='(')
    {
        p++;
        val=expr();
        p++;
        return semn*val;
    }
    while(v[p]>='0' && v[p]<='9')
    {
        val=val*10+(v[p]-'0');
        p++;
    }
    return val*semn;
}
int main()
{
    ifstream f("evaluare.in");
    ofstream g("evaluare.out");
    f.getline(v,100001);
    g<<expr();
    return 0;
}