#include <iostream>
#include <fstream>
using namespace std;
ifstream f("evaluare.in"); ofstream g("evaluare.out");
string s; int ch=0;
int eval();
int termen()
{
    int num=0;
    if(s[ch]=='(') {ch++; return eval();}
    while(s[ch]>='0' && s[ch]<='9')
    {
        num=num*10+s[ch]-'0';
        ch++;
    }
    return num;
}
int factor()
{
    int x=termen();
    while(true)
    {
        if(s[ch]=='*') {ch++; x*=termen();}
        else
        {
            if(s[ch]=='/') {ch++; x/=termen();}
            else return x;
        }
    }
}
int eval()
{
    int rez=0;
    while(true)
    {
        if(s[ch]==')') {ch++; return rez;}
        if(s[ch]=='-') {ch++; rez-=factor();}
        else { if(s[ch]=='+') ch++; rez+=factor();}
    }
}
int main()
{
    f>>s;
    s+=')';
    g<<eval();
    return 0;
}