#include <fstream>

using namespace std;

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


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++;
    }

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

int main()
{
    p=0;
    fin.getline(s, 100001);
    fout<<expresie();
    return 0;
}