2446. Determine if Two Events Have Conflict
Description
You are given two arrays of strings that represent two inclusive events that happened on the same day, event1
and event2
, where:
event1 = [startTime1, endTime1]
andevent2 = [startTime2, endTime2]
.
Event times are valid 24 hours format in the form of HH:MM
.
A conflict happens when two events have some non-empty intersection (i.e., some moment is common to both events).
Return true
if there is a conflict between two events. Otherwise, return false
.
Example 1:
Input: event1 = ["01:15","02:00"], event2 = ["02:00","03:00"] Output: true Explanation: The two events intersect at time 2:00.
Example 2:
Input: event1 = ["01:00","02:00"], event2 = ["01:20","03:00"] Output: true Explanation: The two events intersect starting from 01:20 to 02:00.
Example 3:
Input: event1 = ["10:00","11:00"], event2 = ["14:00","15:00"] Output: false Explanation: The two events do not intersect.
Constraints:
evnet1.length == event2.length == 2.
event1[i].length == event2[i].length == 5
startTime1 <= endTime1
startTime2 <= endTime2
- All the event times follow the
HH:MM
format.
Solutions
Solution 1: String Comparison
If the start time of $event1$ is later than the end time of $event2$, or the end time of $event1$ is earlier than the start time of $event2$, then the two events will not conflict. Otherwise, the two events will conflict.
![](https://spcdn.pages.dev/leetcode/problems/2446.Determine%20if%20Two%20Events%20Have%20Conflict/images/event.png)
The time complexity is $O(1)$, and the space complexity is $O(1)$.
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