#include <iostream>
#include <fstream>
using namespace std;
const int N = 100000;
char s[N+1];
int p;

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

int expresie()
{
    int 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;
    int semn=1;
    while(s[p]=='-')
    {
        p++;
        semn=-semn;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(isdigit(s[p]))
    {
        val = val * 10 + (s[p] - '0');
        p++;
    }
     return semn*val;
}

int main()
{
    ifstream in("evaluare.in");
    ofstream out("evaluare.out");
    in.getline(s, N+1);
    out<<expresie();
    return 0;
}