#include <bits/stdc++.h>

using namespace std;

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

string s;

int termen(int&);
int expresie(int&);
int factor(int&);
int numar(int&);

int expresie(int &p)
{
    int r=termen(p);
    while(s[p]=='+' or s[p]=='-')
    {
        p++;
        if(s[p-1]=='+') r+=termen(p);
        else r-=termen(p);
    }
    return r;
}

int termen(int &p)
{
    int r=factor(p);
    while(s[p]=='/' or s[p]=='*')
    {
        p++;
        if(s[p-1]=='*') r*=factor(p);
        else r/=factor(p);
    }
    return r;
}

int factor(int &p)
{
    int r=0;
    if(s[p]=='(')
    {
        p++;
        r=expresie(p);
        if(s[p]==')') p++;
    }
    else r=numar(p);
    return r;
}

int numar(int &p)
{
    int nr=0;
    while(s[p]>='0' and s[p]<='9')
    {
        nr*=10;
        nr+=(s[p]-'0');
        p++;
    }
    return nr;
}

int main()
{
    fin >> s;
    int p=0;
    fout << expresie(p);
    return 0;
}