problem0797

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Published: Jul 25, 2019 License: MIT Imports: 0 Imported by: 0

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797. All Paths From Source to Target

题目

Given a directed, acyclic graph of N nodes. Find all possible paths from node 0 to node N-1, and return them in any order.

The graph is given as follows: the nodes are 0, 1, ..., graph.length - 1. graph[i] is a list of all nodes j for which the edge (i, j) exists.

Example:
Input: [[1,2], [3], [3], []]
Output: [[0,1,3],[0,2,3]]
Explanation: The graph looks like this:
0--->1
|    |
v    v
2--->3
There are two paths: 0 -> 1 -> 3 and 0 -> 2 -> 3.

Note:

  1. The number of nodes in the graph will be in the range [2, 15].
  2. You can print different paths in any order, but you should keep the order of nodes inside one path.

解题思路

见程序注释

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