#include <iostream>

using namespace std;
const long MAX = 100010;
char f[MAX], *p=f;

long termen();
long factor();

long evaluare()
{
    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*=factor();
            break;
        case '/':
            ++p;
            r/=factor();
            break;
        }
    }
    return r;
}
long factor()
{
    long r=0;
    if(*p=='(')
    {
        ++p;
        r=evaluare();
        ++p;
    }
    else
    {
        while(*p>='0' && *p<='9')
        {
            r=r*10+*p-'0';
            ++p;
        }
    }
    return r;
}
int main()
{
    cin>>f;
    cout<<evaluare();
    return 0;
}