[第五期活动] 在职刷题打卡，目标工作日一天2题，周末一天5题

[Day 28][Total Day 40] 2019/11/29（Lintcode）
- 22. Flatten List
- 528. Flatten Nested List Iterator
- 562. Backpack IV
- 801. Backpack X
- 601. Flatten 2D Vector

day18
1143. Longest Common Subsequence
583. Delete Operation for Two Strings

[19/11/28][Day 10] 1题

Topic: Heap
295. Find Median from Data Stream

[Day 27][Total Day 39] 2019/11/28（Lintcode）
- 405. Submatrix Sum
- 404. Subarray Sum II
- 402. Continuous Subarray Sum
- 403. Continuous Subarray Sum II
- 508. Wiggle Sort
- 507. Wiggle Sort II
- 399. Nuts & Bolts Problem

# Day 22

Course Schedule
LRU Cache, 明天用单向链表做
Longest Substring Without Repeating Characters
Binary Tree Paths

[Day 26][Total Day 38] 2019/11/27，Topic：DP / Subarray Sum（Lintcode）
- 476. Stone Game
- 593. Stone Game II
- 89. k Sum
- 138. Subarray Sum
- 139. Subarray Sum Closest

# Day 21

Path With Maximum Minimum Value
Minimum Cost to Connect Sticks

day17
115. Distinct Subsequences
TLE + memo + dp

[Day 25][Total Day 37] 2019/11/26，Topic：DS（Lintcode）
- 131. The Skyline Problem
- 77. Longest Common Subsequence
- 119. Edit Distance
- 623. K Edit Distance
- 29. Interleaving String
- 440. Backpack III

# Day 20

Next Greater Element II
Boundary of Binary Tree
132 Pattern
Rotting Oranges