#include<fstream>
using namespace std;
char s[100010],*p=s;

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

int termen()
{
    int ret=factor();
    while(*p=='*'||*p=='/')
    {
        if(*p=='*')
        {
            p++;
            ret*=factor();
        }
        else
        {
            p++;
            ret/=factor();
        }
    }
    return ret;
}
int eval()
{
    int ret=termen();
    while(*p=='+'||*p=='-')
        if(*p=='+')
        {
            p++;
            ret+=termen();
        }
        else
        {
            p++;
            ret-=termen();
        }
    return ret;
}

int main()
{
    ifstream q("evaluare.in");
    ofstream w("evaluare.out");
    q>>s;s
    w<<eval();
    return 0;
}