#include <iostream>
#include <fstream>
#define M 100004
#define LL long long
using namespace std;
char s[M],*p=s;
LL termen();
LL factor();

LL eval()
{
    LL r=termen();
    while(*p=='+' || *p=='-')
        switch( *p )
        {
            case '+':
                p++;
                r+=termen();
                break;
            case '-':
                p++;
                r-=termen();
                break;
        }
    return r;
}
LL termen()
{
    LL r=factor();
    while(*p=='*' || *p=='/')
        switch( *p )
        {
            case '*':
                p++;
                r*=factor();
                break;
            case '/':
                p++;
                r/=factor();
                break;
        }
    return r;
}
LL factor()
{
    LL r=0;
    if(*p=='(')
    {
        p++;
        r=eval();
        p++;
    }
    while(*p>='0' && *p<='9')
    {
        r=r*10 + *p - '0';
        p++;
    }
    return r;
}
int main()
{
    ifstream f("evaluare.in");
    ofstream g("evaluare.out");
    f.getline(s,M);
    g<<eval();
}