LeetCode 406 Queue Reconstruction by Height (Python)

Posted by 小明MaxMing on June 6, 2020

题目

Suppose you have a random list of people standing in a queue. Each person is described by a pair of integers (h, k), where h is the height of the person and k is the number of people in front of this person who have a height greater than or equal to h. Write an algorithm to reconstruct the queue.

Note: The number of people is less than 1,100.

解题思路

贪心,按照身高从高到低排序,身高相同则按位置从小到大排序,因为无论矮的人排在哪里,都不会影响高的人,所以就按照排序的结果,按顺序把每个人插入到相应的位置

代码

class Solution:
    def reconstructQueue(self, people: List[List[int]]) -> List[List[int]]:
        people.sort(key = lambda x: (-x[0], x[1]))
        res = []
        for p in people:
            res.insert(p[1], p)
        return res

视频讲解 YouTube<--欢迎点击订阅

视频讲解 bilibili<--欢迎点击订阅