801-900

('$' means the problem is locked on Leetcode, '*' means the problem is related to Database, '#' means the problem is related to Shell.)

#	Title	Solution	Difficulty
900	RLE Iterator	50.50%	Medium
899	Orderly Queue	47.70%	Hard
898	Bitwise ORs of Subarrays	34.70%	Medium
897	Increasing Order Search Tree	65.20%	Easy
896	Monotonic Array	55.40%	Easy
895	Maximum Frequency Stack	56.70%	Hard
894	All Possible Full Binary Trees	71.30%	Medium
893	Groups of Special-Equivalent Strings	63.00%	Easy
892	Surface Area of 3D Shapes	56.10%	Easy
891	Sum of Subsequence Widths	29.20%	Hard
890	Find and Replace Pattern	71.30%	Medium
889	Construct Binary Tree from Preorder and Postorder Traversal	60.70%	Medium
888	Fair Candy Swap	56.90%	Easy
887	Super Egg Drop	24.90%	Hard
886	Possible Bipartition	40.90%	Medium
885	Spiral Matrix III	64.80%	Medium
884	Uncommon Words from Two Sentences	60.90%	Easy
883	Projection Area of 3D Shapes	65.90%	Easy
882	Reachable Nodes In Subdivided Graph	38.20%	Hard
881	Boats to Save People	44.10%	Medium
880	Decoded String at Index	23.00%	Medium
879	Profitable Schemes	36.20%	Hard
878	Nth Magical Number	25.40%	Hard
877	Stone Game	61.10%	Medium
876	Middle of the Linked List	63.80%	Easy
875	Koko Eating Bananas	45.90%	Medium
874	Walking Robot Simulation	31.70%	Easy
873	Length of Longest Fibonacci Subsequence	46.00%	Medium
872	Leaf-Similar Trees	63.10%	Easy
871	Minimum Number of Refueling Stops	28.70%	Hard
870	Advantage Shuffle	42.20%	Medium
869	Reordered Power of 2	50.60%	Medium
868	Binary Gap	59.30%	Easy
867	Transpose Matrix	63.90%	Easy
866	Prime Palindrome	20.00%	Medium
865	Smallest Subtree with all the Deepest Nodes	55.40%	Medium
864	Shortest Path to Get All Keys	35.70%	Hard
863	All Nodes Distance K in Binary Tree	46.80%	Medium
862	Shortest Subarray with Sum at Least K	22.00%	Hard
861	Score After Flipping Matrix	69.30%	Medium
860	Lemonade Change	50.20%	Easy
859	Buddy Strings	27.60%	Easy
858	Mirror Reflection	52.00%	Medium
857	Minimum Cost to Hire K Workers	47.30%	Hard
856	Score of Parentheses	55.90%	Medium
855	Exam Room	38.10%	Medium
854	K-Similar Strings	33.20%	Hard
853	Car Fleet	39.30%	Medium
852	Peak Index in a Mountain Array	68.50%	Easy
851	Loud and Rich	47.40%	Medium
850	Rectangle Area II	44.00%	Hard
849	Maximize Distance to Closest Person	40.40%	Easy
848	Shifting Letters	39.90%	Medium
847	Shortest Path Visiting All Nodes	45.90%	Hard
846	Hand of Straights	48.60%	Medium
845	Longest Mountain in Array	34.00%	Medium
844	Backspace String Compare	45.50%	Easy
843	Guess the Word	42.60%	Hard
842	Split Array into Fibonacci Sequence	34.60%	Medium
841	Keys and Rooms	59.70%	Medium
840	Magic Squares In Grid	35.10%	Easy
839	Similar String Groups	33.50%	Hard
838	Push Dominoes	42.80%	Medium
837	New 21 Game	29.50%	Medium
836	Rectangle Overlap	45.50%	Easy
835	Image Overlap	50.30%	Medium
834	Sum of Distances in Tree	38.10%	Hard
833	Find And Replace in String	44.50%	Medium
832	Flipping an Image	71.30%	Easy
831	Masking Personal Information	41.50%	Medium
830	Positions of Large Groups	47.40%	Easy
829	Consecutive Numbers Sum	32.10%	Hard
828	Unique Letter String	38.10%	Hard
827	Making A Large Island	42.10%	Hard
826	Most Profit Assigning Work	34.70%	Medium
825	Friends Of Appropriate Ages	35.00%	Medium
824	Goat Latin	56.70%	Easy
823	Binary Trees With Factors	31.50%	Medium
822	Card Flipping Game	39.70%	Medium
821	Shortest Distance to a Character	62.60%	Easy
820	Short Encoding of Words	46.00%	Medium
819	Most Common Word	41.50%	Easy
818	Race Car	34.00%	Hard
817	Linked List Components	51.90%	Medium
816	Ambiguous Coordinates	42.40%	Medium
815	Bus Routes	36.10%	Hard
814	Binary Tree Pruning	68.30%	Medium
813	Largest Sum of Averages	42.40%	Medium
812	Largest Triangle Area	53.80%	Easy
811	Subdomain Visit Count	61.50%	Easy
810	Chalkboard XOR Game	41.90%	Hard
809	Expressive Words	39.50%	Medium
808	Soup Servings	33.60%	Medium
807	Max Increase to Keep City Skyline	79.60%	Medium
806	Number of Lines To Write String	62.10%	Easy
805	Split Array With Same Average	21.00%	Hard
804	Unique Morse Code Words	71.30%	Easy
803	Bricks Falling When Hit	22.90%	Hard
802	Find Eventual Safe States	39.20%	Medium
801	Minimum Swaps To Make Sequences Increasing	31.00%	Medium