#include <bits/stdc++.h>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char s[100010];
int i;
int termen();
int factor();
int eval();
int main()
{
    fin.get(s,100004);
    fout<<eval();
    return 0;
}
int factor()
{
    int t=0;
    if(s[i]=='(')
    {
        i++;
        t = eval();
        i++;
    }
    while(s[i]>='0' && s[i]<='9')
    {
        t = t*10 + (s[i]-'0');
        i++;
    }
    return t;
}
int termen()
{
    int t= factor();
    while(s[i]=='*' || s[i] == '/')
    {
        if(s[i]=='*')
        {
            i++;
            t *= factor();

        }
        if(s[i]=='/')
        {
            i++;
            t /= factor();
        }
    }
    return t;
}
int eval()
{
    int t = termen();
    while(s[i]=='+' || s[i]=='-')
    {
        if(s[i]=='+')
        {
            i++;
            t += termen();
        }
        else
        {
            i++;
            t -= termen();
        }
    }
    return t;
}