#include <iostream>
#include <stdio.h>
#include <fstream>

using namespace std;

ifstream f("1.in");
ofstream g("1.out");

char s[100010], *p;

int eval();
int term();
int fact();

int main()
{
    f.getline(s, 100000);
    p=s;
    g<<eval();
}

int eval()
{
    int r=term();
    while (*p=='+' || *p=='-')
        if (*p=='+'){++p; r+=term();}
        else {++p; r-=term();}
    return r;
}

int term()
{
    int r=fact();
    while (*p=='*' || *p=='/')
        if (*p='*'){++p; r*=fact();}
        else {++p; r/=fact();}
    return r;
}

int fact()
{
    int r=0;
    if (*p=='('){++p;
                    eval();
                    ++p;}
    else
        while (*p>='0' && *p<='9')
    {
        r=r*10+(int)*p-'0';
        p++;
    }
    return r;
}