#include <iostream>
#include <fstream>
#include <cstring>
#include <stack>

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

const int strMax = 1e5 + 5;

int N,nrPost;
char str[strMax],prio[256];

struct elem {
    int nr;
    char c;
    elem(int _nr = 0,int _c = '\0') {
        nr = _nr;
        c = _c;
    }
}postfix[strMax];

int getNumber(int&);

int main() {
    in>>(str+1);
    N = strlen(str+1);

    prio['('] = prio[')'] = 1;
    prio['*'] = prio['/'] = 3;
    prio['+'] = prio['-'] = 2;

    int i = 1;
    stack<char> st;
    while (i <= N) {
        if ('0' <= str[i] && str[i] <= '9') {
            int nr = getNumber(i);
            postfix[++nrPost] = elem(nr,'\0');
            //++i;
        }
        else if (str[i] == '(') {
            st.push('(');
            //++i;
        }
        else if (str[i] == ')') {
            while (st.top() != '(') {
                postfix[++nrPost] = elem(0,st.top());
                st.pop();
            }
            st.pop();
        }
        else {
            if (!st.size() || prio[str[i]] > prio[st.top()]) {
                st.push(str[i]);
            }
            else {
                while (st.size() && prio[st.top()] >= prio[str[i]]) {
                    postfix[++nrPost] = elem(0,st.top());
                    st.pop();
                }
                st.push(str[i]);
            }
        }
        ++i;
    }
    while (st.size()) {
        postfix[++nrPost] = elem(0,st.top());
        st.pop();
    }

    for (int i=1;i<=nrPost;++i) {
        if (postfix[i].c == '\0') {
            //cout<<postfix[i].nr<<' ';
        }
        else {
            //cout<<postfix[i].c<<' ';
        }
    }
    //cout<<'\n';

    stack<int> aux;
    for (int i=1;i<=nrPost;++i) {
        if (postfix[i].c == '\0') {
            aux.push(postfix[i].nr);
        }
        else {
            int nr1,nr2,res;
            nr1 = aux.top(); aux.pop();
            nr2 = aux.top(); aux.pop();
            char op = postfix[i].c;
            switch (op) {
                case '+': {
                    res = nr2 + nr1;
                    break;
                }
                case '-': {
                    res = nr2 - nr1;
                    break;
                }
                case '*': {
                    res = nr2 * nr1;
                    break;
                }
                case '/': {
                    res = nr2 / nr1;
                }
            }

            aux.push(res);
        }
        //cout<<aux.top()<<'\n';
    }
    out<<aux.top()<<'\n';

    in.close();out.close();
    return 0;
}

int getNumber(int& i) {
    int nr = 0;
    while ('0' <= str[i] && str[i] <= '9') {
        nr = nr * 10 + (str[i]-'0');
        ++i;
    }
    --i;
    return nr;
}