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题目描述

给定两个由一些 闭区间 组成的列表,firstListsecondList ,其中 firstList[i] = [starti, endi] 而 secondList[j] = [startj, endj] 。每个区间列表都是成对 不相交 的,并且 已经排序

返回这 两个区间列表的交集

形式上,闭区间 [a, b](其中 a <= b)表示实数 x 的集合,而 a <= x <= b

两个闭区间的 交集 是一组实数,要么为空集,要么为闭区间。例如,[1, 3][2, 4] 的交集为 [2, 3]

 

示例 1:

输入:firstList = [[0,2],[5,10],[13,23],[24,25]], secondList = [[1,5],[8,12],[15,24],[25,26]]
输出:[[1,2],[5,5],[8,10],[15,23],[24,24],[25,25]]

示例 2:

输入:firstList = [[1,3],[5,9]], secondList = []
输出:[]

示例 3:

输入:firstList = [], secondList = [[4,8],[10,12]]
输出:[]

示例 4:

输入:firstList = [[1,7]], secondList = [[3,10]]
输出:[[3,7]]

 

提示:

  • 0 <= firstList.length, secondList.length <= 1000
  • firstList.length + secondList.length >= 1
  • 0 <= starti < endi <= 109
  • endi < starti+1
  • 0 <= startj < endj <= 109
  • endj < startj+1

解法

Python3

Java

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