#include <fstream>

using namespace std;

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

int eval();
int term();
int fact();

int main()
{
    g<<eval();

    return 0;
}

int eval()
{
    int r = term();
    char x = f.peek();

    while(x == '+'||x == '-'){
        f.get(x);
        if(x == '+')
            r += term();
        else
            r -= term();
        x = f.peek();
    }

    return r;
}

int term()
{
    int r = fact();
    char x = f.peek();

    while(x == '*' || x=='/'){
        f.get(x);
        if(x == '*')
            r *= fact();
        else
            r /= fact();
        x = f.peek();
    }

    return r;
}

int fact()
{
    int r = 0;
    char x = f.peek();

    if(x == '('){
        f.get(x);
        r = eval();
        f.get(x);
    }
    else
        f >> r;

    return r;
}