1604. Alert Using Same Key-Card Three or More Times in a One Hour Period

https://leetcode.com/problems/alert-using-same-key-card-three-or-more-times-in-a-one-hour-period

Description

LeetCode company workers use key-cards to unlock office doors. Each time a worker uses their key-card, the security system saves the worker's name and the time when it was used. The system emits an alert if any worker uses the key-card three or more times in a one-hour period.

You are given a list of strings keyName and keyTime where [keyName[i], keyTime[i]] corresponds to a person's name and the time when their key-card was used in a single day.

Access times are given in the 24-hour time format "HH:MM", such as "23:51" and "09:49".

Return a list of unique worker names who received an alert for frequent keycard use. Sort the names in ascending order alphabetically.

Notice that "10:00" - "11:00" is considered to be within a one-hour period, while "22:51" - "23:52" is not considered to be within a one-hour period.

Example 1:

**Input:** keyName = ["daniel","daniel","daniel","luis","luis","luis","luis"], keyTime = ["10:00","10:40","11:00","09:00","11:00","13:00","15:00"]
**Output:** ["daniel"]
**Explanation:** "daniel" used the keycard 3 times in a one-hour period ("10:00","10:40", "11:00").

Example 2:

**Input:** keyName = ["alice","alice","alice","bob","bob","bob","bob"], keyTime = ["12:01","12:00","18:00","21:00","21:20","21:30","23:00"]
**Output:** ["bob"]
**Explanation:** "bob" used the keycard 3 times in a one-hour period ("21:00","21:20", "21:30").

Example 3:

**Input:** keyName = ["john","john","john"], keyTime = ["23:58","23:59","00:01"]
**Output:** []

Example 4:

**Input:** keyName = ["leslie","leslie","leslie","clare","clare","clare","clare"], keyTime = ["13:00","13:20","14:00","18:00","18:51","19:30","19:49"]
**Output:** ["clare","leslie"]

Constraints:

• 1 <= keyName.length, keyTime.length <= 105

• keyName.length == keyTime.length

• keyTime[i] is in the format "HH:MM".

• [keyName[i], keyTime[i]] is unique.

• 1 <= keyName[i].length <= 10

• keyName[i] contains only lowercase English letters.

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