#include <bits/stdc++.h>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
int i; char sir[100010];
int adunare();
int produs();
int exp();
int main()
{
    in.getline(sir,100010);
    out<<adunare();
    return 0;
}
int adunare()
{
    int rez=produs();
    while(sir[i]=='+' or sir[i]=='-')
    {
        if(sir[i]=='+')
        { ++i; rez+=produs();}
        else
        { ++i; rez-=produs();}
    }
    return rez;
}
int produs()
{
    int rez=exp();
    while(sir[i]=='*' or sir[i]=='/')
    {
        if(sir[i]=='*')
        { ++i; rez*=exp();}
        else
        { ++i; rez/=exp();}
    }
    return rez;
}
int exp()
{
    int rez=0;
    if(sir[i]=='(')
    { ++i; rez=adunare(); ++i;}
    while(sir[i]>='0' and sir[i]<='9')
    { rez=rez*10+(sir[i]-'0'); ++i;}
    return rez;
}