- 判断两个Strings是否相差一个Edit distance
- implement BST
- Search in the rotated sorted array
- moving media in an array
- implement heap
- reverse a linked list
- How to merge k sorted lists.
- moving media in an array
- find the missing integer in a file with 4 billions elems using 10MB Memory
- Given an array of number, generate a random shuffle, given a random() function.
- Given 6 number, 4 operators and a target number, return true/false (what is the optimal solution for this?)
- moving average in an array
- extend the stack with getMin()
- detect cycle in a linked list
- Given a matrix, 每个格子是doors 或 rooms, 算出每个room的到door的最短距离(任何一个门)
- MxN矩阵,0所在的行和列都置0
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