#include<fstream>
#define NMAX 100005
using namespace std;
ifstream f("evaluare.in"); ofstream g("evaluare.out");
char s[NMAX], *p;
int eval();
int factor();
int termen();
int main()
{
    f>>s;
    p = s;
    int rez = eval();
    g<<rez<<'\n';
    g.close();
    return 0;
}
int eval()
{
    int r = factor();
    switch(*p)
    {
        case '+' : {++p; r += factor(); break;}
        case '-' : {++p; r -= factor(); break;}
    }
    return r;
}
int factor()
{
    int r = termen();
    switch(*p)
    {
        case '*' : {++p; r *= termen(); break;}
        case '/' : {++p; r /= termen(); break;}
    }
    return r;
}
int termen()
{
    int r = 0;
    if(*p == '(')
    {
        ++p;
        r = eval();
        ++p;
    }
    else
    {
        while('0' <= *p && *p <= '9')
        {
            r = r * 10 + *p - '0';
            ++p;
        }
    }
    return r;
}