Prepare basic structure usage

Author: RUAN0007

Basic.md

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+# Typical Problems
+## List
+### Traversal
+* [234 Palindrome Linked List](src/problem/p0234_palindrome_linked_list.rs)
+### Manipulation
+* [206 Reverse Linked List](src/problem/p0206_reverse_linked_list.rs)
+* [21 Merge Two Sorted Lists](src/problem/p0021_merge_two_sorted_lists.rs)
+  * By list heads
+* [19 Remove Nth Node From End of List](src/problem/p0019_remove_nth_node_from_end_of_list.rs)
+  * By mutable references
+### Hard
+* [25 Reverse Nodes in k-Group](src/problem/p0025_reverse_nodes_in_k_group.rs)
+
+
+## Tree
+### DFS Query
+### BFS Query
+### Manipulation
+
+
+
+
+# Recursions
+
+# Combination and Permutation
+##
+##
+
+# DP 
+## 01 Knapsack
+## Infinite Knapsack
+## Classics
+
+# [Collected Template](src/problem/p0000_template.rs)
+* Data structure:
+    * BtreeMap
+    * BtreeSet
+    * HashMap
+    * HashSet
+    * Vector
+    * Iterator
+    * Heap
+    * Stack
+    * Queue
+* Bit Operation
+* Primitives
+    * Option
+    * Typed/Untyped structs
+    * User Input
+* Algorithms
+    * Binary Search
+    * Union Find (Map-based & vector-based)
+
+# Tricks
+Promient Problems
+713 Element count in window sliding. 
+399 str Union Find
+
+Unsolved:
+803
+
+# Resources
+
+# Note
+* LRU(146) and LFU(460) has to be implemented in PYTHON, as only possible to encode in unsafe rust.