#include <iostream>
#include <fstream>
using namespace std;

ifstream in("evaluare.in");
ofstream out("evaluare.out");
const int maxn=100001;
char s[maxn];
char *buffer=s;

int getint()
{
    int nr=0;
    while(*buffer>='0'&&*buffer<='9')
        nr=nr*10+*(buffer++)-'0';
    return nr;
}

int termen();
int factor();

int evaluare()
{
    int r=termen();
    while(*buffer=='+'||*buffer=='-')
        if(*buffer=='+')
        {
            *buffer++;
            r+=termen();
        }
        else
        {
            *buffer++;
            r-=termen();
        }
        return r;
}

int termen()
{
    int r=factor();
    while(*buffer=='*'||*buffer=='/')
        if(*buffer=='*')
    {
        *buffer++;
        r*=factor();
    }
    else
    {
        *buffer++;
        r/=factor();
    }
    return r;
}

int factor()
{
    int r=0;
    if(*buffer=='(')
        {
            *buffer++;
            r=evaluare();
            *buffer++;
        }
        else
            r=getint();
        return r;
}

int main()
{
    in.getline(s,maxn);
    out<<evaluare();
    return 0;
}