//url:https://leetcode.com/problems/unique-email-addresses/
第一次用golang写，感觉好不喜欢,这个的效率很低
solution 1:
func numUniqueEmails(emails []string) int {
	dict := map[string]string{}
	for _, value := range emails {
		ignore := false
        meetFlag:=false
		tmp := ""
		for sIndex, sValue := range value {
			switch sValue {
			case '@':
				{
					tmp += string(value[sIndex])
					ignore = false
                    meetFlag=true
				}
			case '.':
				{
                    if meetFlag {
                        tmp += string(value[sIndex])
                    }else{
					    continue
                    }
				}
			case '+':
				{
					ignore = true
				}
			default:
				{
					if ignore {
						continue
					} else {
						tmp += string(value[sIndex])
					}
				}
			}
		}
		dict[tmp] = tmp
	}
	return len(dict)
}