#include <bits/stdc++.h>

using namespace std;

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

char s[100050],*p;
int r;

int eval();
int termen();
int factor();

int eval()
{

    int r;

    r=termen();

    while(*p=='+'||*p=='-')

        if(*p=='+') {p++; r+=termen();}

        else {p++; r-=termen();}

    return r;

}



int termen()
{

    int r;

    r=factor();

    while(*p=='*'||*p=='/')

        if(*p=='*') {p++; r*=factor();}

        else {p++; r/=factor();}

    return r;

}



int factor()
{

    int r=0;

    if(*p=='(') {p++; r=eval(); p++;}

    else

    {

        while(*p>='0' && *p<='9')

        {

            r=r*10+(int)*p-'0';

            p++;

        }

    }

    return r;

}



int main()

{

    fin.getline(s,100000);

    p=s;

    fout<<eval();

    return 0;

}