252. Meeting Rooms

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252. Meeting Rooms

Description

Given an array of meeting time intervalswhere intervals[i] = [starti, endi], determine if a person could attend all meetings.

Example 1:

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Input: intervals = [[0,30],[5,10],[15,20]]
Output: false

Example 2:

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Input: intervals = [[7,10],[2,4]]
Output: true

Constraints:

  • 0 <= intervals.length <= 10^4
  • intervals[i].length == 2
  • 0 <= starti <endi <= 10^6

Hints/Notes

  • 2025/01/03
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Solution

Language: C++

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class Solution {
public:
    bool canAttendMeetings(vector<vector<int>>& intervals) {
        ranges::sort(intervals);
        int end = -1;
        for (auto interval : intervals) {
            if (interval[0] < end) {
                return false;
            }
            end = max(end, interval[1]);
        }
        return true;
    }
};