#include <fstream>
#include <stack>
#include <string>
#include <map>
using namespace std;
ifstream fi("evaluare.in");
ofstream fo("evaluare.out");
map<char,pair<int,int> > OP;
stack<char> S;

bool oper(char c)
{
    return c=='+'||c=='-'||c=='*'||c=='/'||c=='^';
}
bool cifra(char c)
{
    return c>='0'&&c<='9';
}
void initOP()
{
    OP['+']={1,0},OP['-']={1,0},OP['*']={2,0},OP['/']={2,0},OP['^']={3,1};
}
string rpn(string l)
{
    string rez;
    initOP();
    for(int i=0;i<l.size();i++)
    {
        char c=l[i];
        if(cifra(c))
        {
            rez+=c;
            if(i==l.size()-1||!cifra(l[i+1]))
                rez+='|';
        }
        else if(oper(c))
        {
            while(!S.empty()&&OP[S.top()].first>=OP[c].first&&OP[S.top()].second==0)
            {
                rez+=S.top();
                S.pop();
            }
            S.push(c);
        }
        else if(c=='(')
            S.push(c);
        else if(c==')')
        {
            while(S.top()!='(')
            {
                rez+=S.top();
                S.pop();
            }
            S.pop();
        }
    }
    while(!S.empty())
    {
        rez+=S.top();
        S.pop();
    }
    return rez;
}
int op(int a,int b,int operatie)
{
    if(operatie=='+')
        return a+b;
    if(operatie=='-')
        return a-b;
    if(operatie=='*')
        return a*b;
    if(operatie=='/')
        return a/b;
}
int eval(string s)
{
    int crt=0;
    stack<int> S;
    for(auto c:s)
    {
        if(cifra(c))
            crt=crt*10+(c-'0');
        else
            if(oper(c))
            {
                int a=S.top();
                S.pop();
                int b=S.top();
                S.pop();
                S.push(op(b,a,c));
            }
            else
            {
                S.push(crt);
                crt=0;
            }
    }
    return S.top();
}
string s;
int main()
{
    fi>>s;
    s=rpn(s);
    fo<<eval(s);
    fi.close();
    fo.close();
    return 0;
}