#include <fstream>
#include <cstring>

#define BRACKET	-1000000001
#define PLUS	-1000000002
#define MINUS	-1000000003
#define MUL		-1000000004
#define DIV		-1000000005

using namespace std;

const int NMAX = 1e5;
char s[NMAX + 5];
int n, st[NMAX + 5], top;

inline bool isDigit(const char &ch)
{
    return '0' <= ch && ch <= '9';
}

int GetElement(int &i)
{
    if (s[i] == '(')
        return BRACKET;
    if (s[i] == '+')
        return PLUS;
    if (s[i] == '-')
        return MINUS;
    if (s[i] == '*')
        return MUL;
    if (s[i] == '/')
        return DIV;
    if (isDigit(s[i]))
    {
        int ret = 0;
        while (i <= n && isDigit(s[i]))
        {
            ret = ret * 10 + (s[i] - '0');
            ++i;
        }
        --i;
        return ret;
    }
}

void FirstGrade()
{
    int rez = 0, semn;
    while (true)
    {
        semn = 1;
        if (st[top - 1] == MINUS)
            semn = -1;
        rez += st[top] * semn;
        --top;
        if (st[top] == MINUS || st[top] == PLUS)
            --top;
        if (top == 0 || st[top] == BRACKET)
        {
            st[top + (top == 0)] = rez;
            return;
        }
    }
}

void SecondGrade()
{
    if (st[top] == BRACKET)
        return;
    if (top >= 3 && (st[top - 1] == MUL || st[top - 1] == DIV))
    {
        int rez = st[top - 2];
        if (st[top - 1] == MUL)
            rez *= st[top];
        if (st[top - 1] == DIV)
            rez /= st[top];
        top -= 2;
        st[top] = rez;
    }
}

int main()
{
    ifstream fin("evaluare.in");
    ofstream fout("evaluare.out");
    fin >> (s + 1);
    n = strlen(s + 1);
    for (int i = 1; i <= n; ++i)
    {
        if (s[i] == ')')
        {
            FirstGrade();
            SecondGrade();
        }
        else
        {
            st[++top] = GetElement(i);
            SecondGrade();
        }
    }
    FirstGrade();
    fout << st[1] << "\n";
    fin.close();
    fout.close();
    return 0;
}