#include <iostream>
#include <fstream>

using namespace std;


char s[111111];

int p;


int expresie();
int termen();
int factor();

int expresie()
{
    int sum;
    sum=termen();
    while(s[p]=='+' || s[p]=='-')
    {
        if(s[p]=='+')
        {
            ++p;
            sum+=termen();
        }
        else
        {
            ++p;
            sum-=termen();
        }
    }
    return sum;
}

int termen()
{
    int prod=factor();
    while(s[p]=='*' || s[p]=='/')
    {
        if(s[p]=='*')
        {
            ++p;
            prod*=factor();
        }
        else
        {
            ++p;
            prod/=factor();
        }
    }
    return prod;
}

int factor()
{
    int val=0,semn=1;
    if(s[p]=='-')
    {
        semn=-semn;
        p++;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(s[p]>='0' && s[p]<='9')
    {
        val*=10;
        val+=s[p]-'0';
        ++p;
    }
    return semn*val;
}

int main()
{
    ifstream in("evaluare.in");
    ofstream out("evaluare.out");
    in.getline(s,111111);
    p=0;
    out<<expresie();
    return 0;
}