算法 56. Merge Intervals

56. Merge Intervals

Given a collection of intervals, merge all overlapping intervals.

Example 1:

Input: [[1,3],[2,6],[8,10],[15,18]]
Output: [[1,6],[8,10],[15,18]]
Explanation: Since intervals [1,3] and [2,6] overlaps, merge them into [1,6].

Example 2:

Input: [[1,4],[4,5]]
Output: [[1,5]]
Explanation: Intervals [1,4] and [4,5] are considered overlapping.

class Solution {
    public int[][] merge(int[][] intervals) {
        
    }
}

给一些数，合并所有相交的集合。
解：
也不知道给的集合有木有序，如果能先排个序，然后遍历比较相邻两个集合，就知道能不能合并了。