@@ -87,6 +87,7 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
8787
8888| <!--  --> <!--  --> <!--  --> <!--  --> <!--  --> <!--  --> 
8989|-|-|-|-|-|-
90+ | 0242 |[ Valid Anagram] ( LeetCodeNet/G0201_0300/S0242_valid_anagram/Solution.cs ) | Easy | String, Hash_Table, Sorting | 0 | 100.00
9091
9192#### Day 12 Class and Object  
9293
@@ -209,6 +210,7 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
209210
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211212|-|-|-|-|-|-
213+ | 0380 |[ Insert Delete GetRandom O(1)] ( LeetCodeNet/G0301_0400/S0380_insert_delete_getrandom_o1/RandomizedSet.cs ) | Medium | Array, Hash_Table, Math, Design, Randomized | 10 | 100.00
212214
213215### Graph Theory I  
214216
@@ -579,6 +581,7 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
579581| 0020 |[ Valid Parentheses] ( LeetCodeNet/G0001_0100/S0020_valid_parentheses/Solution.cs ) | Easy | Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_ Space_O(n) | 2 | 82.01
580582| 0005 |[ Longest Palindromic Substring] ( LeetCodeNet/G0001_0100/S0005_longest_palindromic_substring/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_ Space_O(n) | 7 | 95.82
581583| 0394 |[ Decode String] ( LeetCodeNet/G0301_0400/S0394_decode_string/Solution.cs ) | Medium | Top_100_Liked_Questions, String, Stack, Recursion, LeetCode_75_Stack, Big_O_Time_O(n)_ Space_O(n) | 0 | 100.00
584+ | 0242 |[ Valid Anagram] ( LeetCodeNet/G0201_0300/S0242_valid_anagram/Solution.cs ) | Easy | String, Hash_Table, Sorting | 0 | 100.00
582585| 0049 |[ Group Anagrams] ( LeetCodeNet/G0001_0100/S0049_group_anagrams/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n\* k_log_k)_ Space_O(n) | 17 | 83.74
583586| 0151 |[ Reverse Words in a String] ( LeetCodeNet/G0101_0200/S0151_reverse_words_in_a_string/Solution.cs ) | Medium | String, Two_Pointers, LeetCode_75_Array/String | 2 | 67.44
584587
@@ -739,6 +742,8 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
739742| 0122 |[ Best Time to Buy and Sell Stock II] ( LeetCodeNet/G0101_0200/S0122_best_time_to_buy_and_sell_stock_ii/Solution.cs ) | Medium | Top_Interview_Questions, Array, Dynamic_Programming, Greedy | 0 | 100.00
740743| 0055 |[ Jump Game] ( LeetCodeNet/G0001_0100/S0055_jump_game/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_ Space_O(1) | 1 | 99.82
741744| 0045 |[ Jump Game II] ( LeetCodeNet/G0001_0100/S0045_jump_game_ii/Solution.cs ) | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_ Space_O(1) | 0 | 100.00
745+ | 0274 |[ H-Index] ( LeetCodeNet/G0201_0300/S0274_h_index/Solution.cs ) | Medium | Array, Sorting, Counting_Sort | 0 | 100.00
746+ | 0380 |[ Insert Delete GetRandom O(1)] ( LeetCodeNet/G0301_0400/S0380_insert_delete_getrandom_o1/RandomizedSet.cs ) | Medium | Array, Hash_Table, Math, Design, Randomized | 10 | 100.00
742747| 0238 |[ Product of Array Except Self] ( LeetCodeNet/G0201_0300/S0238_product_of_array_except_self/Solution.cs ) | Medium | Top_100_Liked_Questions, Array, Prefix_Sum, LeetCode_75_Array/String, Big_O_Time_O(n^2)_ Space_O(n) | 1 | 100.00
743748| 0134 |[ Gas Station] ( LeetCodeNet/G0101_0200/S0134_gas_station/Solution.cs ) | Medium | Top_Interview_Questions, Array, Greedy | 0 | 100.00
744749| 0135 |[ Candy] ( LeetCodeNet/G0101_0200/S0135_candy/Solution.cs ) | Hard | Array, Greedy | 1 | 99.02
@@ -778,12 +783,16 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
778783| 0054 |[ Spiral Matrix] ( LeetCodeNet/G0001_0100/S0054_spiral_matrix/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Simulation | 0 | 100.00
779784| 0048 |[ Rotate Image] ( LeetCodeNet/G0001_0100/S0048_rotate_image/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_ Space_O(1) | 0 | 100.00
780785| 0073 |[ Set Matrix Zeroes] ( LeetCodeNet/G0001_0100/S0073_set_matrix_zeroes/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Big_O_Time_O(m\* n)_ Space_O(1) | 2 | 73.03
786+ | 0289 |[ Game of Life] ( LeetCodeNet/G0201_0300/S0289_game_of_life/Solution.cs ) | Medium | Array, Matrix, Simulation | 0 | 100.00
781787
782788#### Top Interview 150 Hashmap  
783789
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785791|-|-|-|-|-|-
792+ | 0383 |[ Ransom Note] ( LeetCodeNet/G0301_0400/S0383_ransom_note/Solution.cs ) | Easy | String, Hash_Table, Counting | 1 | 98.72
786793| 0205 |[ Isomorphic Strings] ( LeetCodeNet/G0201_0300/S0205_isomorphic_strings/Solution.cs ) | Easy | String, Hash_Table | 2 | 90.78
794+ | 0290 |[ Word Pattern] ( LeetCodeNet/G0201_0300/S0290_word_pattern/Solution.cs ) | Easy | String, Hash_Table | 0 | 100.00
795+ | 0242 |[ Valid Anagram] ( LeetCodeNet/G0201_0300/S0242_valid_anagram/Solution.cs ) | Easy | String, Hash_Table, Sorting | 0 | 100.00
787796| 0049 |[ Group Anagrams] ( LeetCodeNet/G0001_0100/S0049_group_anagrams/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n\* k_log_k)_ Space_O(n) | 17 | 83.74
788797| 0001 |[ Two Sum] ( LeetCodeNet/G0001_0100/S0001_two_sum/Solution.cs ) | Easy | Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_ Space_O(n), AI_can_be_used_to_solve_the_task | 1 | 98.51
789798| 0202 |[ Happy Number] ( LeetCodeNet/G0201_0300/S0202_happy_number/Solution.cs ) | Easy | Top_Interview_Questions, Hash_Table, Math, Two_Pointers | 0 | 100.00
@@ -794,6 +803,7 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
794803
795804| <!--  --> <!--  --> <!--  --> <!--  --> <!--  --> <!--  --> 
796805|-|-|-|-|-|-
806+ | 0228 |[ Summary Ranges] ( LeetCodeNet/G0201_0300/S0228_summary_ranges/Solution.cs ) | Easy | Array | 0 | 100.00
797807| 0056 |[ Merge Intervals] ( LeetCodeNet/G0001_0100/S0056_merge_intervals/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_ Space_O(n) | 6 | 39.00
798808| 0057 |[ Insert Interval] ( LeetCodeNet/G0001_0100/S0057_insert_interval/Solution.cs ) | Medium | Array | 1 | 99.33
799809
@@ -805,6 +815,7 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
805815| 0071 |[ Simplify Path] ( LeetCodeNet/G0001_0100/S0071_simplify_path/Solution.cs ) | Medium | String, Stack | 2 | 90.87
806816| 0155 |[ Min Stack] ( LeetCodeNet/G0101_0200/S0155_min_stack/MinStack.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_ Space_O(N) | 1 | 100.00
807817| 0150 |[ Evaluate Reverse Polish Notation] ( LeetCodeNet/G0101_0200/S0150_evaluate_reverse_polish_notation/Solution.cs ) | Medium | Top_Interview_Questions, Array, Math, Stack | 11 | 77.03
818+ | 0224 |[ Basic Calculator] ( LeetCodeNet/G0201_0300/S0224_basic_calculator/Solution.cs ) | Hard | String, Math, Stack, Recursion | 3 | 96.26
808819
809820#### Top Interview 150 Linked List  
810821
@@ -838,6 +849,7 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
838849| 0129 |[ Sum Root to Leaf Numbers] ( LeetCodeNet/G0101_0200/S0129_sum_root_to_leaf_numbers/Solution.cs ) | Medium | Depth_First_Search, Tree, Binary_Tree | 0 | 100.00
839850| 0124 |[ Binary Tree Maximum Path Sum] ( LeetCodeNet/G0101_0200/S0124_binary_tree_maximum_path_sum/Solution.cs ) | Hard | Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_ Space_O(N) | 0 | 100.00
840851| 0173 |[ Binary Search Tree Iterator] ( LeetCodeNet/G0101_0200/S0173_binary_search_tree_iterator/BSTIterator.cs ) | Medium | Tree, Binary_Tree, Stack, Design, Binary_Search_Tree, Iterator | 1 | 100.00
852+ | 0222 |[ Count Complete Tree Nodes] ( LeetCodeNet/G0201_0300/S0222_count_complete_tree_nodes/Solution.cs ) | Easy | Depth_First_Search, Tree, Binary_Search, Binary_Tree | 0 | 100.00
841853| 0236 |[ Lowest Common Ancestor of a Binary Tree] ( LeetCodeNet/G0201_0300/S0236_lowest_common_ancestor_of_a_binary_tree/Solution.cs ) | Medium | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Big_O_Time_O(n)_ Space_O(n) | 93 | 68.06
842854
843855#### Top Interview 150 Binary Tree BFS  
@@ -922,6 +934,7 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
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923935|-|-|-|-|-|-
924936| 0215 |[ Kth Largest Element in an Array] ( LeetCodeNet/G0201_0300/S0215_kth_largest_element_in_an_array/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, LeetCode_75_Heap/Priority_Queue, Big_O_Time_O(n\* log(n))_ Space_O(log(n)) | 85 | 88.50
937+ | 0373 |[ Find K Pairs with Smallest Sums] ( LeetCodeNet/G0301_0400/S0373_find_k_pairs_with_smallest_sums/Solution.cs ) | Medium | Array, Heap_Priority_Queue | 52 | 73.33
925938| 0295 |[ Find Median from Data Stream] ( LeetCodeNet/G0201_0300/S0295_find_median_from_data_stream/MedianFinder.cs ) | Hard | Top_100_Liked_Questions, Sorting, Two_Pointers, Design, Heap_Priority_Queue, Data_Stream, Big_O_Time_O(n\* log_n)_ Space_O(n) | 191 | 41.28
926939
927940#### Top Interview 150 Bit Manipulation  
@@ -1007,6 +1020,8 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
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1023+ | 0383 |[ Ransom Note] ( LeetCodeNet/G0301_0400/S0383_ransom_note/Solution.cs ) | Easy | String, Hash_Table, Counting | 1 | 98.72
1024+ | 0242 |[ Valid Anagram] ( LeetCodeNet/G0201_0300/S0242_valid_anagram/Solution.cs ) | Easy | String, Hash_Table, Sorting | 0 | 100.00
10101025
10111026#### Day 7 Linked List  
10121027
@@ -1104,6 +1119,7 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
11041119
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1122+ | 0290 |[ Word Pattern] ( LeetCodeNet/G0201_0300/S0290_word_pattern/Solution.cs ) | Easy | String, Hash_Table | 0 | 100.00
11071123| 0763 |[ Partition Labels] ( LeetCodeNet/G0701_0800/S0763_partition_labels/Solution.cs ) | Medium | Top_100_Liked_Questions, String, Hash_Table, Greedy, Two_Pointers, Big_O_Time_O(n)_ Space_O(1) | 2 | 86.67
11081124
11091125#### Day 8 String  
@@ -1543,6 +1559,7 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
15431559
15441560| <!--  --> <!--  --> <!--  --> <!--  --> <!--  --> <!--  --> 
15451561|-|-|-|-|-|-
1562+ | 0222 |[ Count Complete Tree Nodes] ( LeetCodeNet/G0201_0300/S0222_count_complete_tree_nodes/Solution.cs ) | Easy | Depth_First_Search, Tree, Binary_Search, Binary_Tree | 0 | 100.00
15461563
15471564#### Day 11  
15481565
@@ -1738,20 +1755,30 @@ C#-based LeetCode algorithm problem solutions, regularly updated.
17381755| 0437 |[ Path Sum III] ( LeetCodeNet/G0401_0500/S0437_path_sum_iii/Solution.cs ) | Medium | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Level_2_Day_7_Tree, Big_O_Time_O(n)_ Space_O(n) | 10 | 66.33
17391756| 0416 |[ Partition Equal Subset Sum] ( LeetCodeNet/G0401_0500/S0416_partition_equal_subset_sum/Solution.cs ) | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Level_2_Day_13_Dynamic_Programming, Big_O_Time_O(n\* sums)_ Space_O(n\* sums) | 22 | 82.19
17401757| 0394 |[ Decode String] ( LeetCodeNet/G0301_0400/S0394_decode_string/Solution.cs ) | Medium | Top_100_Liked_Questions, String, Stack, Recursion, LeetCode_75_Stack, Level_1_Day_14_Stack, Udemy_Strings, Big_O_Time_O(n)_ Space_O(n) | 0 | 100.00
1758+ | 0383 |[ Ransom Note] ( LeetCodeNet/G0301_0400/S0383_ransom_note/Solution.cs ) | Easy | String, Hash_Table, Counting, Data_Structure_I_Day_6_String, Top_Interview_150_Hashmap | 1 | 98.72
1759+ | 0380 |[ Insert Delete GetRandom O(1)] ( LeetCodeNet/G0301_0400/S0380_insert_delete_getrandom_o1/RandomizedSet.cs ) | Medium | Array, Hash_Table, Math, Design, Randomized, Programming_Skills_II_Day_20, Top_Interview_150_Array/String | 10 | 100.00
1760+ | 0373 |[ Find K Pairs with Smallest Sums] ( LeetCodeNet/G0301_0400/S0373_find_k_pairs_with_smallest_sums/Solution.cs ) | Medium | Array, Heap_Priority_Queue, Top_Interview_150_Heap | 52 | 73.33
17411761| 0347 |[ Top K Frequent Elements] ( LeetCodeNet/G0301_0400/S0347_top_k_frequent_elements/Solution.cs ) | Medium | Top_100_Liked_Questions, Array, Hash_Table, Sorting, Heap_Priority_Queue, Counting, Divide_and_Conquer, Quickselect, Bucket_Sort, Data_Structure_II_Day_20_Heap_Priority_Queue, Big_O_Time_O(n\* log(n))_ Space_O(k) | 7 | 75.70
17421762| 0338 |[ Counting Bits] ( LeetCodeNet/G0301_0400/S0338_counting_bits/Solution.cs ) | Easy | Dynamic_Programming, Bit_Manipulation, LeetCode_75_Bit_Manipulation, Udemy_Bit_Manipulation, Big_O_Time_O(num)_ Space_O(num) | 0 | 100.00
17431763| 0322 |[ Coin Change] ( LeetCodeNet/G0301_0400/S0322_coin_change/Solution.cs ) | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_20, Level_2_Day_12_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(m\* n)_ Space_O(amount) | 12 | 97.87
17441764| 0300 |[ Longest Increasing Subsequence] ( LeetCodeNet/G0201_0300/S0300_longest_increasing_subsequence/Solution.cs ) | Medium | Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Algorithm_II_Day_16_Dynamic_Programming, Binary_Search_II_Day_3, Dynamic_Programming_I_Day_18, Udemy_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(n\* log_n)_ Space_O(n) | 2 | 93.82
17451765| 0295 |[ Find Median from Data Stream] ( LeetCodeNet/G0201_0300/S0295_find_median_from_data_stream/MedianFinder.cs ) | Hard | Top_100_Liked_Questions, Sorting, Two_Pointers, Design, Heap_Priority_Queue, Data_Stream, Top_Interview_150_Heap, Big_O_Time_O(n\* log_n)_ Space_O(n) | 191 | 41.28
1766+ | 0290 |[ Word Pattern] ( LeetCodeNet/G0201_0300/S0290_word_pattern/Solution.cs ) | Easy | String, Hash_Table, Data_Structure_II_Day_7_String, Top_Interview_150_Hashmap | 0 | 100.00
1767+ | 0289 |[ Game of Life] ( LeetCodeNet/G0201_0300/S0289_game_of_life/Solution.cs ) | Medium | Array, Matrix, Simulation, Top_Interview_150_Matrix | 0 | 100.00
17461768| 0287 |[ Find the Duplicate Number] ( LeetCodeNet/G0201_0300/S0287_find_the_duplicate_number/Solution.cs ) | Medium | Top_100_Liked_Questions, Array, Binary_Search, Two_Pointers, Bit_Manipulation, Binary_Search_II_Day_5, Big_O_Time_O(n)_ Space_O(n) | 1 | 100.00
17471769| 0283 |[ Move Zeroes] ( LeetCodeNet/G0201_0300/S0283_move_zeroes/Solution.cs ) | Easy | Top_100_Liked_Questions, Array, Two_Pointers, LeetCode_75_Two_Pointers, Algorithm_I_Day_3_Two_Pointers, Programming_Skills_I_Day_6_Array, Udemy_Arrays, Big_O_Time_O(n)_ Space_O(1) | 1 | 96.12
1770+ | 0274 |[ H-Index] ( LeetCodeNet/G0201_0300/S0274_h_index/Solution.cs ) | Medium | Array, Sorting, Counting_Sort, Top_Interview_150_Array/String | 0 | 100.00
1771+ | 0242 |[ Valid Anagram] ( LeetCodeNet/G0201_0300/S0242_valid_anagram/Solution.cs ) | Easy | String, Hash_Table, Sorting, Data_Structure_I_Day_6_String, Programming_Skills_I_Day_11_Containers_and_Libraries, Udemy_Strings, Top_Interview_150_Hashmap | 0 | 100.00
17481772| 0240 |[ Search a 2D Matrix II] ( LeetCodeNet/G0201_0300/S0240_search_a_2d_matrix_ii/Solution.cs ) | Medium | Top_100_Liked_Questions, Array, Binary_Search, Matrix, Divide_and_Conquer, Data_Structure_II_Day_4_Array, Binary_Search_II_Day_8, Big_O_Time_O(n+m)_ Space_O(1) | 156 | 77.90
17491773| 0239 |[ Sliding Window Maximum] ( LeetCodeNet/G0201_0300/S0239_sliding_window_maximum/Solution.cs ) | Hard | Top_100_Liked_Questions, Array, Heap_Priority_Queue, Sliding_Window, Queue, Monotonic_Queue, Udemy_Arrays, Big_O_Time_O(n\* k)_ Space_O(n+k) | 32 | 94.92
17501774| 0238 |[ Product of Array Except Self] ( LeetCodeNet/G0201_0300/S0238_product_of_array_except_self/Solution.cs ) | Medium | Top_100_Liked_Questions, Array, Prefix_Sum, LeetCode_75_Array/String, Data_Structure_II_Day_5_Array, Udemy_Arrays, Top_Interview_150_Array/String, Big_O_Time_O(n^2)_ Space_O(n) | 1 | 100.00
17511775| 0236 |[ Lowest Common Ancestor of a Binary Tree] ( LeetCodeNet/G0201_0300/S0236_lowest_common_ancestor_of_a_binary_tree/Solution.cs ) | Medium | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Data_Structure_II_Day_18_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(n)_ Space_O(n) | 93 | 68.06
17521776| 0234 |[ Palindrome Linked List] ( LeetCodeNet/G0201_0300/S0234_palindrome_linked_list/Solution.cs ) | Easy | Top_100_Liked_Questions, Two_Pointers, Stack, Linked_List, Recursion, Level_2_Day_3_Linked_List, Udemy_Linked_List, Big_O_Time_O(n)_ Space_O(1) | 4 | 60.29
17531777| 0230 |[ Kth Smallest Element in a BST] ( LeetCodeNet/G0201_0300/S0230_kth_smallest_element_in_a_bst/Solution.cs ) | Medium | Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_II_Day_17_Tree, Level_2_Day_9_Binary_Search_Tree, Top_Interview_150_Binary_Search_Tree, Big_O_Time_O(n)_ Space_O(n) | 0 | 100.00
1778+ | 0228 |[ Summary Ranges] ( LeetCodeNet/G0201_0300/S0228_summary_ranges/Solution.cs ) | Easy | Array, Top_Interview_150_Intervals | 0 | 100.00
17541779| 0226 |[ Invert Binary Tree] ( LeetCodeNet/G0201_0300/S0226_invert_binary_tree/Solution.cs ) | Easy | Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_12_Tree, Level_2_Day_6_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(n)_ Space_O(n) | 0 | 100.00
1780+ | 0224 |[ Basic Calculator] ( LeetCodeNet/G0201_0300/S0224_basic_calculator/Solution.cs ) | Hard | String, Math, Stack, Recursion, Top_Interview_150_Stack | 3 | 96.26
1781+ | 0222 |[ Count Complete Tree Nodes] ( LeetCodeNet/G0201_0300/S0222_count_complete_tree_nodes/Solution.cs ) | Easy | Depth_First_Search, Tree, Binary_Search, Binary_Tree, Binary_Search_II_Day_10, Top_Interview_150_Binary_Tree_General | 0 | 100.00
17551782| 0221 |[ Maximal Square] ( LeetCodeNet/G0201_0300/S0221_maximal_square/Solution.cs ) | Medium | Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Top_Interview_150_Multidimensional_DP, Big_O_Time_O(m\* n)_ Space_O(m\* n) | 3 | 96.90
17561783| 0219 |[ Contains Duplicate II] ( LeetCodeNet/G0201_0300/S0219_contains_duplicate_ii/Solution.cs ) | Easy | Array, Hash_Table, Sliding_Window, Top_Interview_150_Hashmap | 12 | 98.14
17571784| 0215 |[ Kth Largest Element in an Array] ( LeetCodeNet/G0201_0300/S0215_kth_largest_element_in_an_array/Solution.cs ) | Medium | Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, LeetCode_75_Heap/Priority_Queue, Data_Structure_II_Day_20_Heap_Priority_Queue, Top_Interview_150_Heap, Big_O_Time_O(n\* log(n))_ Space_O(log(n)) | 85 | 88.50
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