tri树实战题目

https://leetcode-cn.com/problems/implement-trie-prefix-tree/#/description

https://leetcode-cn.com/problems/word-search-ii/

分析单词搜索 2 用 Tire 树方式实现的时间复杂度，请同学们提交在学习总结中。

并查集实战题目

https://leetcode-cn.com/problems/friend-circles

https://leetcode-cn.com/problems/number-of-islands/

https://leetcode-cn.com/problems/surrounded-regions/

高级搜索——剪枝实战题目

https://leetcode-cn.com/problems/climbing-stairs/

https://leetcode-cn.com/problems/generate-parentheses/

https://leetcode-cn.com/problems/n-queens

https://leetcode-cn.com/problems/valid-sudoku/description/

https://leetcode-cn.com/problems/sudoku-solver/#/description

启发式实战题目

https://leetcode-cn.com/problems/shortest-path-in-binary-matrix/

https://leetcode-cn.com/problems/sliding-puzzle/

https://leetcode-cn.com/problems/sudoku-solver/

本周作业

简单

https://leetcode-cn.com/problems/climbing-stairs/

中等

https://leetcode-cn.com/problems/implement-trie-prefix-tree/#/description

https://leetcode-cn.com/problems/friend-circles

https://leetcode-cn.com/problems/number-of-islands/

https://leetcode-cn.com/problems/surrounded-regions/

https://leetcode-cn.com/problems/valid-sudoku/description/

https://leetcode-cn.com/problems/generate-parentheses/

https://leetcode-cn.com/problems/word-ladder/

https://leetcode-cn.com/problems/minimum-genetic-mutation/

困难

https://leetcode-cn.com/problems/word-search-ii/

https://leetcode-cn.com/problems/n-queens

https://leetcode-cn.com/problems/sudoku-solver/#/description