#include<cstdio>
using namespace std;

const long MAX = 100010;
char S[MAX], *p=S;

long termen();
long factor();

long eval()
{
    long r = termen();
    while ( *p == '+' || *p == '-')
    {
        switch( *p )
        {
        case '+':
            ++p;
            r += termen();
            break;
        case '-':
            ++p;
            r -= termen();
            break;
        }
    }

    return r;
}

long termen()
{
    long r = factor();
    while ( *p == '*' || *p == '/')
    {
        switch( *p )
        {
        case '*':
            ++p;
            r *= termen();
            break;
        case '/':
            ++p;
            r /= termen();
            break;
        }
    }
    return r;
}

long factor()
{
    long r = 0;
    if ( *p == '(')
    {
        ++p;
        r = eval();
        ++p;
    }
    else
    {
        while ( *p >= '0' && *p <= '9' )
        {
            r = r * 10 + *p - '0';
            ++p;
        }
    }
    return r;
}

int main()
    {
        fgets(S, MAX, fopen("evaluare.in", "r"));
        fprintf(fopen("evaluare.out", "w"), "%ld\n", eval());
    }