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题解 | #括号生成#

Backtracking is also DFS but it is a little bit different from DFS. the nuance is we backtrack to the previous level of the tree so we have pop-off ac...

backtrack dfs Python

2021-08-05

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题解 | #岛屿数量#

DFS: once '1' is found then trigger dfs() to search all adjacent '1' and flip them as '0', since all adjacent '1' are regarded as one island. Use for ...

dfs python

2021-08-05

0 493