#include <fstream>
using namespace std;
ifstream cin ("evaluare.in");
ofstream cout ("evaluare.out");
char s[100001];
int i;
int expresie();
int termen();
int factor();
int constanta();
int main()
{
    cin>>s;
    i=0;
    cout<<expresie();
}
int expresie()
{
    int r=termen();
    while(s[i]=='+' || s[i]=='-')
    {
        if(s[i]=='+') ++i,r+=termen();
        else i++,r-=termen();
    }
    return r;
}
int termen()
{
    int r=factor();
    while(s[i]=='*' || s[i]=='/')
    {
        if(s[i]=='*') ++i,r*=factor();
        else ++i,r/=factor();
    }
    return r;
}
int factor()
{
    int r;
    if(s[i]=='(') ++i,r=expresie(),++i;
    else r=constanta();
    return r;
}
int constanta()
{
    int r=0;
    while(s[i]>='0' && s[i]<='9')
    {
        r=r*10+s[i]-'0';
        ++i;
    }
    return r;
}