#include <bits/stdc++.h>

using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");

char e[100010],*p;
int suma(),termen(),factor();
int main()
{
    p=e;
    f>>p;
    g<<suma();
    return 0;
}
int suma()
{
    int rez=termen();
    while(*p=='+'||*p=='-')
    {
        if(*p=='+'){p++;rez+=termen();}
        else       {p++;rez-=termen();}
    }
    return rez;
}
int termen()
{
    int rez=factor();
    while(*p=='*'||*p=='/')
    {
        if(*p=='*'){p++;rez*=factor();}
        else       {p++;rez/=factor();}
    }
    return rez;
}
int factor()
{
    if(*p=='(')
    {
        p++;/// sar peste (
        int rez=suma();
        p++;/// sar peste )
        return rez;
    }
    /// altfel am numar
    int rez=0;
    while(isdigit(*p))
    {
        rez=10*rez+*p-'0';
        p++;
    }
    return rez;
}

//expresie = suma(diferenta) de termeni
//termen = produs(fractie) de factori
//factor =
//    numar SAU
//    ( expresie )