#1 (2)
--------------------------------------------------------------------------------
#2 (3)
--------------------------------------------------------------------------------
#3 (5)
最长回文子串
--------------------------------------------------------------------------------
#4 (287)
寻找重复数
--------------------------------------------------------------------------------
#5 (300)
最长上升子序列
--------------------------------------------------------------------------------
#6 (309)
最佳买卖股票时机含冷冻期
--------------------------------------------------------------------------------
#7 (322)
零钱兑换
--------------------------------------------------------------------------------
#8 (337)
打家劫舍II
--------------------------------------------------------------------------------
#9 (338)
比特位计数
--------------------------------------------------------------------------------
#10 (347)
前K个高频元素
--------------------------------------------------------------------------------