1.
Introduce
2.
Number
2.1.
BigNumber
3.
String
3.1.
EditDistance
3.2.
Literal-expression
3.3.
Similar
4.
Map
4.1.
HashMap
4.2.
CurrentHashMap(zk)
4.3.
CopyonWritMap(zk)
4.4.
LinkedHashMap(LRU)
5.
Tree
5.1.
Traverse
5.1.1.
Depth-First
5.1.2.
Breed-First
5.2.
BinaryTree
5.2.1.
BasicBinaryTree
5.2.2.
BinarySearchTree
5.2.2.1.
RedBlackTree
5.2.2.1.1.
Redblack and AVL Tree
5.2.2.1.2.
TreeMap
5.3.
Heap
5.4.
TreeSet
6.
Quene
6.1.
Deque
6.2.
PriorityQueue
7.
List
7.1.
Array&LinkedList
7.2.
SkipList
Light (default)
Rust
Coal
Navy
Ayu
https://leetcode.com/problems/multiply-strings/