2019.Nov.19
- [f84a602f0bc8165d54d0fa2370447ce269822d38 , 5992d40735449d3dce430900e553a07ae3e30962]
- Review leetcode 494, 133
2019.Nov.21
- [5236c808a65786e44b9f394d26d6b76ed51ee9dc, e673214def21365c9dddd6c4e265597961a3eab5]
- Review leetcode open the lock(752)
- how to use for loop in various ways to meet your calculation
- unifying deadends and visited.