#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
char s[100001];
int p;
int expresie();
int termen();
int factor();
int expresie()
{
    int suma;
    suma=termen();
    while(s[p]=='+'||s[p]=='-')
    {
        if(s[p]=='+')
        {
            p++;
            suma+=termen();
        }
        else
        {
            p++;
            suma-=termen();
        }
    }
    return suma;
}
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,semn=1;
    while(s[p]=='-')
    {
        p++;
        semn=-semn;
    }
    while(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(s[p]>='0'&&s[p]<='9')
    {
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}
int main()
{
    ifstream fin ("evaluare.in");
    ofstream fout ("evaluare.out");
    fin>>s;
    fout<<expresie();
    return 0;
}