#include <iostream>
#include <fstream>
#include <string>
#include <stack>

using namespace std;
    ofstream out("evaluare.out");

int comp(int a, int b, int c)
{
    if(a==0&&c=='/')
        return 0;
    switch (c)
    {
        case '+': return (b+a);
        case '-': return (b-a);
        case '/': return (b/a);
        case '*': return (b*a);
    }
}

int main()
{
    string str;
    stack <int> postfix;
    stack <char> ops;
    ifstream in("evaluare.in");
    getline (in, str);
    in.close();
    int i = -1;
    while ((++i) < str.size())
    {
        if(str[i]=='+')
        {
            if(!ops.empty())
            {
                while(ops.top()=='*'||ops.top()=='/'||ops.top()=='-')
                {
                    int a = postfix.top();
                    postfix.pop();
                    int b = postfix.top();
                    postfix.pop();
                    postfix.push(comp(a,b,ops.top()));
                    ops.pop();
                    if(ops.empty())
                        break;
                }
            }
            ops.push('+');
        }
        else
        if(str[i]=='-')
        {
            if(!ops.empty())
            {
                while(ops.top()=='*'||ops.top()=='/'||ops.top()=='+')
                {
                    int a = postfix.top();
                    postfix.pop();
                    int b = postfix.top();
                    postfix.pop();
                    postfix.push(comp(a,b,ops.top()));
                    ops.pop();
                    if(ops.empty())
                        break;
                }
            }
            ops.push('-');
        }
        else
        if(str[i]=='*')
        {
            if(!ops.empty())
            {
                if(ops.top()=='/')
                {
                    int a = postfix.top();
                    postfix.pop();
                    int b = postfix.top();
                    postfix.pop();

                    postfix.push(comp(a,b,'/'));
                    ops.pop();
                    if(ops.empty())
                        break;
                }
            }
            ops.push('*');
        }
        else
        if(str[i]=='/')
        {
            if(!ops.empty())
            {
                while(ops.top()=='*'||ops.top()=='/')
                {
                    int a = postfix.top();
                    postfix.pop();
                    int b = postfix.top();
                    postfix.pop();
                    postfix.push(comp(a,b,ops.top()));
                    ops.pop();
                    if(ops.empty())
                        break;
                }
            }
            ops.push('/');
        }
        else
        if(str[i]=='(')
        {
            ops.push('(');
        }
        else
        if(str[i]==')')
        {
            while(ops.top()!='(')
            {
                int a = postfix.top();
                postfix.pop();
                int b = postfix.top();
                postfix.pop();
                postfix.push(comp(a,b,ops.top()));
                ops.pop();
            }
            ops.pop();
        }
        else
        {
            int temp = 0;
            while(str[i]>=48 && str[i]<=57)
            {
                temp = temp*10 + (str[i] - 48);
                ++i;
            }
            --i;
            postfix.push(temp);
        }
    }

    while(!ops.empty())
    {
        int a = postfix.top();
        postfix.pop();
        int b = postfix.top();
        postfix.pop();
        postfix.push(comp(a,b,ops.top()));
        ops.pop();
    }
    out << postfix.top();
    out.close();
    return 0;
}