思路: k k k短路模板题。 引入估值函数 d ( x ) d(x) d(x)代表从 x x x出发到终点的最短距离,这可以通过反向最短路求出来。维护 f ( x ) f(x) f(x)代表起点出发到 x x x点的最短距离。 A ∗ A* A∗算法中堆中每次取出最小的 f ( x ) + d ( x ) f(x)+d(x) f(x)+d(x)对应的点进行松弛。这样一个点第 k k k次出
problem select inn.Score,inn.Rank from (select ss.Score,@row:=@row+1 as Rankfrom (select @row:=0) a,(select Score from Scores group by Score) as ssorder by ss.Score desc) as innright joinScores as
题目:178. 分数排名 (通过次数166,157 | 提交次数273,273,通过率60.80%) 表:Scores+-------------+---------+| Column Name | Type |+-------------+---------+| id | int || score | decimal |+-------
题目: 表: Scores +-------------+---------+| Column Name | Type |+-------------+---------+| id | int || score | decimal |+-------------+---------+在 SQL 中,id 是该表的主键。该表的每一行都包含了
文章目录 题目描述结果示例解题思路知识拓展 题目描述 表: Scores +-------------+---------+| Column Name | Type |+-------------+---------+| id | int || score | decimal |+-------------+--------