N – Longest Ordered Subsequence (LIS)
A numeric sequence of ai is ordered if a1 < a2 …
L – Common Subsequence （LCS+滚动数组）
A subsequence of a given sequence is the given seq …
H – Tickets （简单dp）
Jesus, what a great movie! Thousands of people are …
G – 免费馅饼 （简单dp）
都说天上不会掉馅饼，但有一天gameboy正走在回家的小径上，忽然天上掉下大把大把的馅 …