#include <fstream>
#include <vector>
using namespace std;
int pr(char c)
{
    if(c=='(' || c==')')
        return 0;
    if(c=='*' || c=='/')
        return 1;
    if(c=='+' || c=='-')
        return 2;
}
vector<char> fp;
vector<char> st;
vector<int> st2;
int main()
{
    ifstream cin("evaluare.in");
    ofstream cout("evaluare.out");
    char x,a,b,cnt=0;
    int n=0,na,nb;
    string s;
    cin >> s;
    for(int i=0;i<s.size();i++)
    {
        x=s[i];
        if('0'<=x && x<='9')
        {
            fp.push_back(x);
            continue;
        }
        else
        {
            fp.push_back(' ');
            st.push_back(x);
        }
        if(st.size()>=2 && pr(st.back())==1)
        {
            b=st.back();
            st.pop_back();
            a=st.back();
            if(pr(a)==1)
            {
                fp.push_back(a);
                fp.push_back(' ');
                st.pop_back();
            }
            st.push_back(b);
        }
        if(st.size()>=2 && pr(st.back())==2)
        {
            b=st.back();
            st.pop_back();
            a=st.back();
            if(pr(a)>=1)
            {
                fp.push_back(a);
                fp.push_back(' ');
                st.pop_back();
            }
            st.push_back(b);
        }
        if(st.size()>0 && st.back()==')')
        {
            st.pop_back();
            while(1)
            {
                if(st.back()!='(')
                {
                    fp.push_back(st.back());
                    fp.push_back(' ');
                    st.pop_back();
                }
                else
                {
                    st.pop_back();
                    break;
                }
            }
        }
    }
    while(st.size()>0)
    {
        fp.push_back(st.back());
        st.pop_back();
    }
    cout << '\n';
    int i=0;
    while(i<fp.size())
    {
        while(fp[i]==' ')
        {
            i++;
        }
        if('0'<=fp[i] && fp[i]<='9')
        {
            while('0'<=fp[i] && fp[i]<='9')
            {
                n=n*10+(fp[i]-'0');
                i++;
            }
            st2.push_back(n);
            n=0;
        }
        else if(st2.size()>=2)
        {
            x=fp[i];
            nb=st2.back();
            st2.pop_back();
            na=st2.back();
            st2.pop_back();
            if(x=='+')
                st2.push_back(na+nb);
            if(x=='-')
                st2.push_back(na-nb);
            if(x=='*')
                st2.push_back(na*nb);
            if(x=='/')
                st2.push_back(na/nb);
            i++;
        }
    }
    cout << st2.back();
    return 0;
}