2242. Maximum Score of a Node Sequence
Description
There is an undirected graph with n
nodes, numbered from 0
to n - 1
.
You are given a 0-indexed integer array scores
of length n
where scores[i]
denotes the score of node i
. You are also given a 2D integer array edges
where edges[i] = [ai, bi]
denotes that there exists an undirected edge connecting nodes ai
and bi
.
A node sequence is valid if it meets the following conditions:
- There is an edge connecting every pair of adjacent nodes in the sequence.
- No node appears more than once in the sequence.
The score of a node sequence is defined as the sum of the scores of the nodes in the sequence.
Return the maximum score of a valid node sequence with a length of 4
. If no such sequence exists, return -1
.
Example 1:
![](https://spcdn.pages.dev/leetcode/problems/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex1new3.png)
Input: scores = [5,2,9,8,4], edges = [[0,1],[1,2],[2,3],[0,2],[1,3],[2,4]] Output: 24 Explanation: The figure above shows the graph and the chosen node sequence [0,1,2,3]. The score of the node sequence is 5 + 2 + 9 + 8 = 24. It can be shown that no other node sequence has a score of more than 24. Note that the sequences [3,1,2,0] and [1,0,2,3] are also valid and have a score of 24. The sequence [0,3,2,4] is not valid since no edge connects nodes 0 and 3.
Example 2:
![](https://spcdn.pages.dev/leetcode/problems/2242.Maximum%20Score%20of%20a%20Node%20Sequence/images/ex2.png)
Input: scores = [9,20,6,4,11,12], edges = [[0,3],[5,3],[2,4],[1,3]] Output: -1 Explanation: The figure above shows the graph. There are no valid node sequences of length 4, so we return -1.
Constraints:
n == scores.length
4 <= n <= 5 * 104
1 <= scores[i] <= 108
0 <= edges.length <= 5 * 104
edges[i].length == 2
0 <= ai, bi <= n - 1
ai != bi
- There are no duplicate edges.
Solutions
Solution 1
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