func (s *Stack) Contain(v int) bool {
	for _, val := range s.a {
		if val == v {
			return true
		}
	}
	return false
}
// Contain returns true if a stack contains a value v otherwise returns false

Contain returns true if a stack contains a value v otherwise returns false
// Contain returns true if a stack contains a value v otherwise returns false
func (s *Stack) Contain(v int) bool {
	for _, val := range s.a {
		if val == v {
			return true
		}
	}
	return false
}
func ( s * Stack ) Contain ( v int ) bool { for _ , val := range s . a { if val == v { return true } } return false }
Contain returns true if a stack contains a value v otherwise returns false
Contain returns true if a stack contains a value v otherwise returns false