#include <fstream>

using namespace std;

ifstream f("evaluare.in");
ofstream g("evaluare.out");

char s[100005];
char* p;

int termen();
int factor();
int calc();

int factor()
{
    int rez = 0;
    if (*p == '(')
        p++, rez = calc(), p++;
    else if (*p >= '0' && *p <= '9')
    {
        while (*p >= '0' && *p <= '9')
            rez = rez*10 + *p - '0', p++;
    }
    return rez;
}

int termen()
{
    int rez = factor();
    while (*p == '*' || *p == '/')
    {
        if (*p == '*')
            p++, rez *= factor();
        if (*p == '/')
            p++, rez /= factor();
    }
    return rez;
}

int calc()
{
    int rez = termen();
    while (*p == '+' || *p == '-')
    {
        if (*p == '+')
            p++, rez += termen();
        else if (*p == '-')
            p++, rez -= termen();
    }
    return rez;
}

int main()
{
    f >> s;
    p = s;
    g << calc();
    return 0;
}