#include <iostream>
#include <fstream>

using namespace std;

const int N = 100001;
char s[N];
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();
        }
}
int factor(){
    int val = 0, semn=1;
    while(s[p]=='-')
    {
        semn=-semn;
        p++;
    }
    if(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 in("expresie.in");
    ofstream out("expresie.out");
    in.getline(s, N);
    out<<expresie();
    return 0;
}