Day 3 | 203. Remove Linked List Elements | 707. Design Linked List | 206. Reverse Linked List
Day1|704.BinarySearch|27.RemoveElement|35.SearchInsertPosition|34.FirstandLastPositionofElementinSortedArrayDay2|977.SquaresofaSortedArray|209.MinimumSizeSubarraySum|59.SpiralMatrixIIDirectoryBasicCon