本周学习简单总结
请一定在今天完成LeetCode全部算法题目
Leetcode算法题：
树：
递归：https://leetcode.com/problems/balanced-binary-tree/description/
层次遍历：https://leetcode.com/problems/find-bottom-left-tree-value/description/
前中后序遍历：https://leetcode.com/problems/binary-tree-preorder-traversal/description/
BST：https://leetcode.com/problems/kth-smallest-element-in-a-bst/description/
Trie：https://leetcode.com/problems/implement-trie-prefix-tree/description/
图：
二分图：https://leetcode.com/problems/is-graph-bipartite/description/
拓扑排序：https://leetcode.com/problems/course-schedule/description/
并查集：https://leetcode.com/problems/redundant-connection/description/
1
2
3
4
