#include <fstream>

using namespace std;

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

typedef int valoare;

#define N 100001

char x[N];
valoare p=0;

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

valoare main()
{
    in.get(x, 100000);
    out << expresie();

    in.close();
    out.close();
    return 0;
}

valoare expresie()
{
    int sum=termen();
    while(x[p]=='+' || x[p]=='-')
    {
        if(x[p]=='-')
        {
            p++;
            sum-=termen();
        }
        if(x[p]=='+')
        {
            p++;
            sum+=termen();
        }
    }

    return sum;
}

valoare termen()
{
    valoare prod = factor();
    while(x[p]=='*' || x[p]=='/')
    {
        if(x[p]=='*')
        {
            p++;
            prod*= factor();
        }
        if(x[p]=='/')
        {
            p++;
            prod/=factor();
        }
    }

    return prod;
}

valoare factor()
{
    valoare semn=1, val=0;
    while(x[p]=='-')
    {
        p++;
        semn*=-1;
    }
    if(x[p]=='(')
    {
        p++;
        val=expresie();
        p++;

        return semn*val;
    }
    while(x[p]>='0' && x[p]<='9')
        val=val*10 + (x[p++]-'0');

    return semn*val;
}