Flower Planting With No Adjacent

Similar Problems:

You have N gardens, labelled 1 to N. In each garden, you want to plant one of 4 types of flowers.

paths[i] = [x, y] describes the existence of a bidirectional path from garden x to garden y.

Also, there is no garden that has more than 3 paths coming into or leaving it.

Your task is to choose a flower type for each garden such that, for any two gardens connected by a path, they have different types of flowers.

Return any such a choice as an array answer, where answer[i] is the type of flower planted in the (i+1)-th garden. The flower types are denoted 1, 2, 3, or 4. It is guaranteed an answer exists.

Example 1:

Input: N = 3, paths = [[1,2],[2,3],[3,1]] Output: [1,2,3]

Example 2:

Input: N = 4, paths = [[1,2],[3,4]] Output: [1,2,1,2]

Example 3:

Input: N = 4, paths = [[1,2],[2,3],[3,4],[4,1],[1,3],[2,4]] Output: [1,2,3,4]

Note:

- 1 <= N <= 10000
- 0 <= paths.size <= 20000
- No garden has 4 or more paths coming into or leaving it.
- It is guaranteed an answer exists.

Github: code.dennyzhang.com

Credits To: leetcode.com

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- Solution: XXX

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// Blog link: https://code.dennyzhang.com/flower-planting-with-no-adjacent