Array & List

https://leetcode-cn.com/problems/remove-duplicates-from-sorted-array/

https://leetcode-cn.com/problems/rotate-array/

https://leetcode-cn.com/problems/merge-two-sorted-lists/

https://leetcode-cn.com/problems/merge-sorted-array/

https://leetcode-cn.com/problems/swap-nodes-in-pairs/

https://leetcode-cn.com/problems/3sum/

Map & Set

https://leetcode-cn.com/problems/valid-anagram/

1. 字母异位词分组

https://leetcode-cn.com/problems/group-anagrams/

stack & queue

https://leetcode-cn.com/problems/remove-all-adjacent-duplicates-in-string/https://leetcode-cn.com/problems/remove-outermost-parentheses/
https://leetcode.com/problems/largest-rectangle-in-histogram/
https://leetcode.com/problems/trapping-rain-water/

binarySearch

https://leetcode-cn.com/problems/arranging-coins/
https://leetcode-cn.com/problems/powx-n/
https://leetcode-cn.com/problems/dungeon-game/

reduction

https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/https://leetcode-cn.com/problems/symmetric-tree/
https://leetcode-cn.com/problems/minimum-depth-of-binary-tree/
https://leetcode-cn.com/problems/minimum-distance-between-bst-nodes/
https://leetcode-cn.com/problems/binary-tree-paths/
https://leetcode-cn.com/problems/range-sum-of-bst/
https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree/

hash

https://leetcode-cn.com/problems/two-sum/
https://leetcode-cn.com/problems/valid-anagram/
https://leetcode-cn.com/problems/longest-substring-without-repeating-characters
https://leetcode-cn.com/problems/top-k-frequent-words
https://leetcode-cn.com/problems/number-of-atoms/

binary tree

https://leetcode-cn.com/problems/minimum-depth-of-binary-tree/https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-tree/
https://leetcode-cn.com/problems/symmetric-tree/
https://leetcode-cn.com/problems/binary-tree-zigzag-level-order-traversal/
https://leetcode-cn.com/problems/binary-tree-level-order-traversal/
https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree/

bst

https://leetcode-cn.com/problems/minimum-distance-between-bst-nodes/
https://leetcode-cn.com/problems/lowest-common-ancestor-of-a-binary-searchhttps://leetcode-cn.com/problems/validate-binary-search-tree/
https://leetcode-cn.com/problems/range-sum-of-bst/
https://leetcode-cn.com/problems/contains-duplicate-iii/
https://leetcode-cn.com/problems/count-of-smaller-numbers-after-self/

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

heap & sort

https://leetcode.com/problems/number-of-islands/
https://leetcode-cn.com/problems/course-schedule-ii
https://leetcode-cn.com/problems/kth-largest-element-in-a-stream/
https://leetcode-cn.com/problems/find-median-from-data-stream/

DFS

https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/
https://leetcode-cn.com/problems/minimum-depth-of-binary-tree/
https://leetcode-cn.com/problems/friend-circles/
https://leetcode-cn.com/problems/find-eventual-safe-states/
https://leetcode-cn.com/problems/longest-increasing-path-in-a-matrix/
https://leetcode-cn.com/problems/minesweeper/
https://leetcode-cn.com/problems/word-ladder/

BFS

https://leetcode-cn.com/problems/n-ary-tree-level-order-traversal/
https://leetcode-cn.com/problems/binary-tree-level-order-traversal/
https://leetcode.com/problems/binary-tree-level-order-traversal-ii/
https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/
https://leetcode-cn.com/problems/minesweeper/
https://leetcode-cn.com/problems/minimum-height-trees/

trie

https://leetcode-cn.com/problems/longest-word-in-dictionary/
https://leetcode-cn.com/problems/implement-trie-prefix-tree/
https://leetcode-cn.com/problems/add-and-search-word-data-structure-design/ https://leetcode-cn.com/problems/word-search-ii/

分治

https://leetcode-cn.com/problems/majority-element/https://leetcode-cn.com/problems/maximum-subarray/
https://leetcode-cn.com/problems/search-a-2d-matrix-ii/

贪心

https://leetcode-cn.com/problems/assign-cookies/
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee/

回溯

https://leetcode-cn.com/problems/letter-case-permutation/
https://leetcode-cn.com/problems/subsets/
https://leetcode-cn.com/problems/permutations/
https://leetcode-cn.com/problems/combinations/
https://leetcode-cn.com/problems/n-queens/

动态规划

https://leetcode-cn.com/problems/climbing-stairs/
https://leetcode.com/problems/house-robber/
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-with-cooldown/
https://leetcode.com/problems/house-robber-ii/
https://leetcode.com/problems/house-robber-iii/
https://leetcode.com/problems/unique-paths/
https://leetcode.com/problems/unique-paths-ii/
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iv/
https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock-iii/