type pair struct {
    start int
    end int
}
type MyCalendar []pair
func Constructor() MyCalendar {
    return MyCalendar{}
}
func (this *MyCalendar) Book(start int, end int) bool {
    for _, p := range *this{
        if p.end > start && p.start < end{
            return false
        }
    }
    *this = append(*this, pair{start, end})
    return true
}
/**
 * Your MyCalendar object will be instantiated and called as such:
 * obj := Constructor();
 * param_1 := obj.Book(start,end);
 */