# Problem Code Type Topic Companies Average Time Score
1 Different Bits Sum Pairwise code Bit Manipulation
47:24 300
2 Divide Integers code Bit Manipulation 60:09 250
3 Min XOR value code Bit Manipulation 36:57 200
4 Number of 1 Bits code Bit Manipulation 8:44 200
5 Reverse Bits code Bit Manipulation 23:17 225
6 Single Number code Bit Manipulation 11:50 275
7 Single Number II code Bit Manipulation 38:10 275
8 All Unique Permutations code Backtracking
48:04 10
9 Combination Sum code Backtracking 57:21 300
10 Combination Sum II code Backtracking 38:17 300
11 Combinations code Backtracking 42:55 300
12 Generate all Parentheses II code Backtracking
49:00 350
13 Gray Code code Backtracking
53:25 350
14 Kth Permutation Sequence code Backtracking 67:17 350
15 Letter Phone code Backtracking 50:37 250
16 Minimum number of swaps required for arranging pairs adjacent to each other code Backtracking
55:34 200
17 NQueens code Backtracking 68:10 550
18 Number of Squareful Arrays code Backtracking
41:45 200
19 Palindrome Partitioning code Backtracking 62:28 300
20 Permutations code Backtracking 37:35 350
21 Remove Invalid Parentheses code Backtracking
72:46 200
22 Subset code Backtracking 58:51 250
23 Subsets II code Backtracking 37:08 300
24 Sudoku code Backtracking 59:48 700
25 Unique Paths III code Backtracking
41:56 200
26 Longest Increasing Subsequence code Dynamic Programming 29:01 300
27 Max Rectangle in Binary Matrix code Dynamic Programming
69:06 350
28 Distinct Subsequences code Dynamic Programming
55:21 325
29 Unique Paths in a Grid code Dynamic Programming
30:29 300
30 Max Product Subarray code Dynamic Programming 58:34 300
31 Ways to Decode code Dynamic Programming 65:26 225
32 Best Time to Buy and Sell Stocks II code Dynamic Programming 36:52 225
33 Best Time to Buy and Sell Stocks III code Dynamic Programming 52:52 700
34 Scramble String code Dynamic Programming
54:20 500
35 Best Time to Buy and Sell Stocks I code Dynamic Programming 26:25 300
36 Max Sum Path in Binary Tree code Dynamic Programming 49:41 400
37 Regular Expression Match code Dynamic Programming
62:17 500
38 Dungeon Princess code Dynamic Programming
58:33 300
39 Palindrome Partitioning II code Dynamic Programming 51:22 400
40 Min Sum Path in Matrix code Dynamic Programming 28:40 300
41 Min Jumps Array code Dynamic Programming 64:09 300
42 Edit Distance code Dynamic Programming 43:22 300
43 Unique Binary Search Trees II code Dynamic Programming 31:49 400
44 Word Break code Dynamic Programming
IBM
54:49 400
45 Regular Expression II code Dynamic Programming
57:53 500
46 Min Sum Path in Triangle code Dynamic Programming
39:24 300
47 Jump Game Array code Dynamic Programming 38:21 225
48 Interleaving Strings code Dynamic Programming
51:58 500
49 Word Break II code Dynamic Programming
IBM
55:12 350
50 Longest valid Parentheses code Dynamic Programming
52:09 700
51 Stairs code Dynamic Programming 14:49 225
52 Max Sum Without Adjacent Elements code Dynamic Programming 53:38 225
53 Repeating Sub-Sequence code Dynamic Programming
57:13 300
54 Evaluate Expression To True code Dynamic Programming 66:07 350
55 Coins in a Line code Dynamic Programming
54:37 300
56 Arrange II code Dynamic Programming 67:55 350
57 Equal Average Partition code Dynamic Programming 82:55 350
58 Coin Sum Infinite code Dynamic Programming
58:24 225
59 Rod Cutting code Dynamic Programming
75:51 350
60 Intersecting Chords in a Circle code Dynamic Programming
61:35 300
61 Count Permutations of BST code Dynamic Programming
75:17 400
62 Queen Attack code Dynamic Programming
74:08 350
63 Longest Arithmetic Progression code Dynamic Programming
62:42 200
64 Sub Matrices with sum Zero code Dynamic Programming
71:06 200
65 N digit numbers with digit sum S code Dynamic Programming
60:26 200
66 Length of Longest Subsequence code Dynamic Programming
61:20 200
67 Shortest common superstring code Dynamic Programming
68:18 200
68 Flip Array code Dynamic Programming
79:15 200
69 Ways to color a 3xN Board code Dynamic Programming 56:11 200
70 Tushar's Birthday Bombs code Dynamic Programming
74:52 200
71 Tushar's Birthday Party code Dynamic Programming 58:40 200
72 Kth Manhattan Distance Neighbourhood code Dynamic Programming 62:09 200
73 Largest area of rectangle with permutations code Dynamic Programming 62:22 200
74 Kingdom War code Dynamic Programming
50:39 200
75 Longest Common Subsequence code Dynamic Programming
29:36 200
76 Longest Pallindromic Subsequence code Dynamic Programming
32:19 200
77 Tree coloring with three colors code Dynamic Programming
69:16 200
78 Lexographically Greater Strings code Dynamic Programming
41:47 200
79 Obsessive String code Dynamic Programming
18:13 200
80 Two Strings code Dynamic Programming
48:40 200
81 Divisor Sequences code Dynamic Programming
41:36 200
82 Required Substrings code Dynamic Programming
2:38 200
83 Unreliable Rover code Dynamic Programming
14:17 200
84 Best Time to Buy and Sell Stock atmost B times code Dynamic Programming
39:27 200
85 Best Time to Buy and Sell Stock with Cooldown code Dynamic Programming
27:49 200
86 String count code Dynamic Programming
11:07 200
87 Longest Palindromic Substring code Dynamic Programming
1:04 200
88 Count Palindromic Subsequences code Dynamic Programming
53:41 200
89 Matrix Chain Multiplication code Dynamic Programming
45:25 200
90 Burst Balloons code Dynamic Programming
47:29 200
91 Length of Longest Fibonacci Subsequence code Dynamic Programming
30:41 200
92 Box Stacking Problem code Dynamic Programming
60:13 200
93 Russian Doll Envelopes code Dynamic Programming
79:36 200
94 Grid Unique Paths II code Dynamic Programming
25:13 200
95 Tiling Problem New code Dynamic Programming
12:56 200
96 ALL GCD New code Dynamic Programming
41:32 200
97 GCD PAIRS New code Dynamic Programming
53:48 200
98 Actors and their Movies sql SQL Programming
27:29 100
99 Movie Character sql SQL Programming
27:20 100
100 Neutral Reviewers sql SQL Programming
21:40 100
101 Short Films sql SQL Programming
23:29 100
102 Check two bracket expressions code Stacks And Queues
44:50 200
103 Decode String code Stacks And Queues
36:47 200
104 Evaluate Expression code Stacks And Queues
32:13 400
105 First negative integer in window size B code Stacks And Queues
30:00 200
106 First non-repeating character in a stream of characters code Stacks And Queues
24:20 200
107 Infix to Postfix code Stacks And Queues
50:05 200
108 Largest Rectangle in Histogram code Stacks And Queues 61:36 450
109 Maximum Frequency stack code Stacks And Queues
54:49 200
110 Maximum Rectangle code Stacks And Queues
21:16 200
111 Min Stack code Stacks And Queues 42:29 400
112 N integers containing only 1,2 and 3 code Stacks And Queues
21:12 200
113 Nearest Smaller Element code Stacks And Queues 41:04 350
114 Order them code Stacks And Queues
34:32 200
115 Rain Water Trapped code Stacks And Queues 55:28 400
116 Reduce the string code Stacks And Queues
12:48 200
117 Redundant Braces code Stacks And Queues 41:47 300
118 Remove Duplicate Letters code Stacks And Queues
66:01 200
119 Reverse a stack using recursion code Stacks And Queues
21:55 200
120 Reversing the first B elements of queue code Stacks And Queues
10:09 200
121 Simplify Directory Path code Stacks And Queues
51:27 250
122 Sliding Window Maximum code Stacks And Queues 64:19 450
123 Sort stack using another stack code Stacks And Queues
29:50 200
124 Sum of minimum and maximum elements of all subarrays of size k code Stacks And Queues
26:01 200
125 Lines in a given range shell Basic Shell Commands
32:02 200
126 Valid phone number shell Basic Shell Commands
23:22 150
127 Transform CSV shell Basic Shell Commands
22:40 300
128 Remove Punctuations shell Basic Shell Commands
14:26 250
129 Design Messenger subjective System Design Interview Questions 41:40 600
130 Design Search Typeahead subjective System Design Interview Questions
53:20 400
131 Design Twitter subjective System Design Interview Questions 38:20 600
132 Design URL Shortener subjective System Design Interview Questions 45:00 300
133 AMORTIZED1 objective Time Complexity
3:03 100
134 Best Time to Buy and Sell Stock with Transaction Fee code Time Complexity
18:29 200
135 Bridges in a graph code Time Complexity
14:04 200
136 CHOOSE1 objective Time Complexity
1:43 50
137 CHOOSE2 objective Time Complexity
2:23 80
138 CHOOSE3 objective Time Complexity
1:39 50
139 CHOOSE4 objective Time Complexity
0:57 50
140 Distance of nearest cell having 1 in a binary matrix code Time Complexity
42:11 200
141 Find subsequence code Time Complexity
13:35 200
142 Floyd Warshall Algorithm code Time Complexity
24:02 200
143 GCD_CMPL objective Time Complexity
4:13 150
144 LOOP_CMPL objective Time Complexity
2:43 20
145 LOOP_CMPL2 objective Time Complexity
2:43 80
146 Matrix Permutation code Time Complexity
16:44 200
147 Minimum Weight Cycle in an Undirected weighted Graph code Time Complexity
75:07 100
148 Move all zeroes to end of the array code Time Complexity
27:13 200
149 NESTED_CMPL objective Time Complexity
1:10 20
150 NESTED_CMPL2 objective Time Complexity
1:25 30
151 NESTED_CMPL3 objective Time Complexity
3:56 80
152 REC_CMPL1 objective Time Complexity
6:58 80
153 REC_CMPL2 objective Time Complexity
6:25 80
154 REC_CMPL3 objective Time Complexity
4:39 150
155 Shortest Distance in a graph with two different weights code Time Complexity
24:29 200
156 Treasure Hunt code Time Complexity
39:59 145
157 WHILE_CMPL objective Time Complexity
1:31 50
158 XOR TRIPLETS New code Time Complexity
0:44 200
159 Matrix Search code Binary Search
36:11 250
160 Median of Array code Binary Search 76:35 325
161 Search for a Range code Binary Search
41:28 250
162 Square Root of Integer code Binary Search 40:32 275
163 Implement Power Function code Binary Search
59:24 275
164 Rotated Sorted Array Search code Binary Search 56:20 325
165 Sorted Insert Position code Binary Search
24:24 250
166 Allocate Books code Binary Search
61:42 350
167 Painter's Partition Problem code Binary Search 73:48 350
168 Matrix Median code Binary Search
69:03 225
169 Aggressive cows code Binary Search
47:41 200
170 Smallest Good Base code Binary Search
57:47 200
171 Single Element in a Sorted Array code Binary Search
21:18 200
172 Find a peak element code Binary Search
11:46 200
173 Special Integer code Binary Search
30:15 200
174 Falling Dominoes code Binary Search
77:00 200
175 ADD OR NOT New code Binary Search
61:39 200
176 LEFTOVER New code Binary Search
33:58 200
177 Ath Magical Number New code Binary Search
45:09 200
178 Convert Integer To Roman Number shell Regex and Functions
29:47 400
179 Sort by Frequency shell Regex and Functions
44:16 250
180 Swap Forward And Backward Slash shell Regex and Functions
14:27 200
181 Valid Email Address shell Regex and Functions
32:12 350
182 Design Cache subjective Storage Scalability 40:00 200
183 Highly Available Database subjective Storage Scalability 50:00 400
184 Highly Consistent Database subjective Storage Scalability
50:00 400
185 Sharding a Database subjective Storage Scalability 35:00 200
186 Calculator frontend HTML5
10:00 200
187 Clock frontend HTML5
10:00 200
188 Flip Counter frontend HTML5
10:00 200
189 Ping Pong Game frontend HTML5
10:00 200
190 Rock Paper Scissor frontend HTML5
10:00 200
191 Sign up form frontend HTML5
10:00 200
192 Tic Tac Toe frontend HTML5
10:00 200
193 2 Sum code Hashing 47:26 300
194 4 Sum code Hashing 63:03 325
195 Anagrams code Hashing 44:45 350
196 Colorful Number code Hashing 42:44 150
197 Contiguous Array code Hashing
33:43 200
198 Copy List code Hashing 50:27 450
199 Count Right Triangles code Hashing
26:35 200
200 Diffk II code Hashing
27:23 375
201 Equal code Hashing
65:31 350
202 Find if there is a sub-array with 0 sum code Hashing
14:02 200
203 Find pairs in array whose sum is already present code Hashing
14:03 200
204 Fraction code Hashing 73:58 450
205 Grid Illumination code Hashing
78:31 200
206 Largest Continuous Sequence Zero Sum code Hashing
62:44 200
207 Lightsabers code Hashing
35:58 200
208 Longest Substring Without Repeat code Hashing 48:04 350
209 Maximum Points on the same line code Hashing
38:25 200
210 Palindrome Pairs code Hashing
37:37 200
211 Parity Queries code Hashing
26:59 200
212 Points on the Straight Line code Hashing 68:39 450
213 Sort an array according to the order defined by another array code Hashing
20:27 200
214 Subarray Sum Equals K code Hashing
27:40 200
215 Substring Concatenation code Hashing
66:18 1000
216 Time Based Key-Value Store code Hashing
36:42 200
217 Valid Sudoku code Hashing 45:51 325
218 Window String code Hashing 71:08 350
219 100 People in a Circle objective Puzzles
11:33 40
220 Ants on a Triangle objective Puzzles
4:46 40
221 Arrange Cubes objective Puzzles
16:00 40
222 Bee Travel objective Puzzles
8:08 40
223 Blindfolded Coin Toss objective Puzzles
3:18 40
224 Breaking Chocolate Bars objective Puzzles
5:09 40
225 Cats and a Square objective Puzzles
7:37 40
226 Celebrity Problem objective Puzzles
8:40 40
227 Color of the Bear objective Puzzles
3:31 40
228 Color of the last ball objective Puzzles
5:10 40
229 Color of the last ball II objective Puzzles
3:13 40
230 Cross the Bridge objective Puzzles
8:41 40
231 Cross the Bridge II objective Puzzles
5:35 40
232 Daughters' Ages objective Puzzles
12:18 40
233 Dinner Hand Shakes objective Puzzles
7:03 40
234 Divide Gold Bar objective Puzzles 5:48 40
235 Divide the Cake objective Puzzles
3:00 40
236 Eggs and Building objective Puzzles 12:53 40
237 Equilateral Triangles using Toothpicks objective Puzzles
5:57 40
238 Fake Note objective Puzzles
5:21 40
239 Fastest Horses objective Puzzles
7:03 40
240 Find the Defective Ball objective Puzzles
6:19 40
241 Find the Defective Ball II objective Puzzles
2:54 40
242 Gates of Heaven objective Puzzles
7:51 40
243 Genie and Hats objective Puzzles
7:16 40
244 Good Processor objective Puzzles
7:51 40
245 Helium Balloon objective Puzzles
1:53 40
246 Jelly Beans Jars objective Puzzles
7:23 40
247 Last Palindromic Date objective Puzzles
10:50 40
248 Light Switches in the Cellar objective Puzzles 2:53 40
249 Make a Statement objective Puzzles 4:18 40
250 Marbles in Jar objective Puzzles
10:50 40
251 Measure Milk by Cans objective Puzzles 14:38 40
252 Measure Time by Burning Ropes objective Puzzles
6:45 40
253 Measure Time by Hourglass objective Puzzles
8:56 40
254 Medicine Chest on a Boat objective Puzzles
8:58 40
255 Min Elevator Trips objective Puzzles
19:39 40
256 Monkeys and Doors objective Puzzles 10:59 40
257 Next Number objective Puzzles
17:17 40
258 Next Number II objective Puzzles 3:08 40
259 One Mile on the Globe objective Puzzles
7:36 40
260 Prisoners and Poison objective Puzzles 17:02 40
261 Quarters on a Table objective Puzzles
4:54 40
262 Ratio of Boys and Girls objective Puzzles
14:35 40
263 Six Colored Cubes objective Puzzles
12:55 40
264 Spider's Web objective Puzzles 3:37 40
265 Spinning Disc's Direction objective Puzzles
6:48 40
266 Ten Black and White Socks objective Puzzles
4:10 40
267 The Tribe objective Puzzles 6:02 40
268 Train Station objective Puzzles
18:03 40
269 Two Numbers objective Puzzles
12:05 40
270 Two Pills each day objective Puzzles
3:24 40
271 Wizards and Drawves objective Puzzles
12:38 40
272 World Trips objective Puzzles
9:14 40
273 Palindromic Substrings Count code Strings
24:40 200
274 Add Binary Strings code Strings
39:14 300
275 Amazing Subarrays code Strings
24:21 150
276 Anagram Substring Search code Strings
27:52 200
277 Atoi code Strings 50:49 250
278 Compare Version Numbers code Strings 62:09 225
279 Count And Say code Strings
41:44 250
280 Custom Sort String code Strings
28:43 200
281 EDIBLE STRINGS New code Strings
15:29 200
282 Implement StrStr code Strings 32:59 225
283 INFINITE STRING New code Strings
44:50 200
284 Integer To Roman code Strings 39:21 250
285 Justified Text code Strings
69:19 300
286 K-th character of decrypted string code Strings
35:03 200
287 kth character in double decrypted string code Strings
40:43 200
288 Length of Last Word code Strings 17:54 225
289 Longest Common Prefix code Strings
27:30 225
290 Longest Palindromic Substring code Strings 56:59 500
291 MINIMIZE THE XOR New code Strings
10:00 200
292 Minimum Characters required to make a String Palindromic code Strings 60:52 200
293 MODIFIED SEARCH New code Strings
10:00 200
294 Multiply Strings code Strings
58:48 375
295 Palindrome String code Strings
30:40 150
296 Power of 2 code Strings 58:16 350
297 Pretty Json code Strings
57:51 400
298 Reverse the String code Strings 36:23 250
299 Roman To Integer code Strings 32:19 250
300 Starting indices of the substrings in string code Strings
45:17 200
301 String representation using its substring code Strings
49:15 200
302 Stringoholics code Strings
67:47 300
303 Valid Ip Addresses code Strings 58:26 250
304 Valid Number code Strings 54:30 250
305 Zigzag String code Strings
50:25 300
306 Add Two Numbers as Lists code Linked Lists 42:18 250
307 Delete middle node of a Linked List code Linked Lists
13:33 200
308 Design Linked list code Linked Lists
60:04 200
309 Detect and Remove Loop from a linked list code Linked Lists
21:32 200
310 Insertion Sort List code Linked Lists
45:08 300
311 K reverse linked list code Linked Lists 55:46 200
312 Length of longest palindromic list code Linked Lists
34:17 200
313 List Cycle code Linked Lists 38:56 600
314 Merge Two Sorted Lists code Linked Lists 28:38 300
315 Middle element of linked list code Linked Lists
8:01 200
316 Palindrome List code Linked Lists 46:33 200
317 Partition List code Linked Lists
47:01 275
318 Remove Duplicates from Sorted List code Linked Lists 17:43 300
319 Remove Duplicates from Sorted List II code Linked Lists 55:19 300
320 Remove Nth Node from List End code Linked Lists 27:01 350
321 Reorder List code Linked Lists 55:23 600
322 Reverse Link List II code Linked Lists 56:50 450
323 Rotate List code Linked Lists 32:45 350
324 Sort List code Linked Lists
52:58 350
325 Swap List Nodes in pairs code Linked Lists 32:26 350
326 Another chocolate game code Codersbit
42:12 200
327 Array and Prime Divisors code Codersbit
24:47 150
328 Delete and Conquer code Codersbit
12:19 150
329 Distinct Primes code Codersbit
51:56 150
330 EZPZ code Codersbit
34:04 200
331 Going back to OS objective Codersbit
14:46 30
332 Longest Subarray Difference code Codersbit
62:43 200
333 MinimiZe code Codersbit
31:21 200
334 Prime Subarrays code Codersbit
25:50 150
335 Scores code Codersbit
66:40 200
336 Shortest Path in Simple Graph objective Codersbit
4:03 30
337 Smallest Subarray code Codersbit
34:29 250
338 The Sequence game code Codersbit
25:41 200
339 The square game code Codersbit
8:35 200
340 Three Numbers code Codersbit
44:35 200
341 Try some SQL objective Codersbit
10:13 30
342 Very Hard Queries code Codersbit
64:55 200
343 Vowels code Codersbit
56:49 250
344 2-Sum Binary Tree code Tree Data Structure 58:00 400
345 Balanced Binary Tree code Tree Data Structure 29:32 275
346 Binary Tree From Inorder And Postorder code Tree Data Structure 45:05 375
347 Binary Tree Paths code Tree Data Structure
25:54 200
348 Boundary Traversal Of Binary Tree code Tree Data Structure
49:00 200
349 BST Iterator code Tree Data Structure 37:07 500
350 BST nodes in a range code Tree Data Structure
8:16 200
351 Check for BST with exactly one child of each internal nodes code Tree Data Structure
29:29 200
352 Check if given Preorder, Inorder and Postorder traversals are of same tree code Tree Data Structure
51:39 200
353 Common Nodes in Two Binary Search Trees code Tree Data Structure
17:07 200
354 Construct Binary Tree From Inorder And Preorder code Tree Data Structure 42:03 375
355 Convert an arbitrary Binary Tree to a tree that holds Children Sum Property code Tree Data Structure
37:54 200
356 Difference between odd and even levels code Tree Data Structure
8:20 200
357 Duplicates in binary tree code Tree Data Structure
64:57 200
358 Equal Tree Partition code Tree Data Structure
49:23 200
359 Flatten Binary Tree to Linked List code Tree Data Structure 40:45 500
360 GREEDY PICK New code Tree Data Structure
191:02 200
361 Hotel Reviews code Tree Data Structure 65:09 200
362 Identical Binary Trees code Tree Data Structure 11:24 300
363 Inorder Traversal code Tree Data Structure 31:37 350
364 Inorder Traversal of Cartesian Tree code Tree Data Structure 46:07 300
365 Invert the Binary Tree code Tree Data Structure
12:26 300
366 K DISTANCE New code Tree Data Structure
14:53 200
367 Kth Smallest Element In Tree code Tree Data Structure 27:56 300
368 Largest BST Subtree code Tree Data Structure
56:29 200
369 Least Common Ancestor code Tree Data Structure 55:13 450
370 Left view of binary tree code Tree Data Structure
12:26 200
371 Longest Consecutive Sequence in Binary tree code Tree Data Structure
18:28 200
372 Longest path in a subtree code Tree Data Structure
42:39 200
373 Max Depth of Binary Tree code Tree Data Structure 6:49 350
374 Merge Two BSTs code Tree Data Structure
21:58 200
375 Min Depth of Binary Tree code Tree Data Structure 16:45 350
376 Node distance C in binary tree code Tree Data Structure
27:58 200
377 Order of People Heights code Tree Data Structure
66:29 700
378 Path Sum code Tree Data Structure 26:26 350
379 Populate Next Right Pointers Tree code Tree Data Structure 47:13 900
380 Postorder Traversal code Tree Data Structure 30:05 350
381 Power of 3 New code Tree Data Structure
1:20 200
382 Preorder Traversal code Tree Data Structure 14:44 350
383 Print all root to leaf paths code Tree Data Structure
11:29 200
384 Recover Binary Search Tree code Tree Data Structure 56:00 750
385 Remove nodes from Path sum less than B code Tree Data Structure
30:36 200
386 Root to Leaf Paths With Sum code Tree Data Structure 38:48 350
387 Shortest Unique Prefix code Tree Data Structure
64:27 350
388 Smallest Subtree with all the Deepest Nodes code Tree Data Structure
27:36 200
389 Sorted Array To Balanced BST code Tree Data Structure 27:16 300
390 Steps to get out of complete binary tree code Tree Data Structure
61:03 200
391 Subarrays Xor less Than B code Tree Data Structure
60:19 200
392 Sum binary tree or not code Tree Data Structure
18:36 200
393 Sum Root to Leaf Numbers code Tree Data Structure
42:38 350
394 Symmetric Binary Tree code Tree Data Structure 20:59 300
395 TOP VIEW New code Tree Data Structure
38:17 200
396 Trees and Sum of Distances New code Tree Data Structure
8:53 200
397 Vertex Cover Problem New code Tree Data Structure
30:35 200
398 ZigZag Level Order Traversal BT code Tree Data Structure 40:41 350
399 3 Sum code Two Pointers 58:27 225
400 3 Sum Zero code Two Pointers
50:58 225
401 Array 3 Pointers code Two Pointers
49:55 400
402 Container With Most Water code Two Pointers 45:41 400
403 Count of pairs with the given sum code Two Pointers
17:12 200
404 Count of pairs with the given sum II New code Two Pointers
27:30 200
405 Count of rectangles with area less than the given number code Two Pointers
54:12 200
406 Counting Triangles code Two Pointers
56:51 225
407 Diffk code Two Pointers
28:27 300
408 Find sub-array with the given sum code Two Pointers
29:48 200
409 Find the closest pair from two sorted arrays code Two Pointers
33:05 200
410 Good Subarrays code Two Pointers
29:35 200
411 Intersection Of Sorted Arrays code Two Pointers
18:12 225
412 Max Continuous Series of 1s code Two Pointers 72:25 300
413 Merge Two Sorted Lists II code Two Pointers 24:46 200
414 Minimize the absolute difference code Two Pointers
58:04 200
415 Remove Duplicates from Sorted Array code Two Pointers 31:11 250
416 Remove Duplicates from Sorted Array II code Two Pointers 31:38 250
417 Remove Element from Array code Two Pointers 27:33 250
418 Sort by Color code Two Pointers
22:24 325
419 Black Shapes code Graph Data Structure & Algorithms 45:07 300
420 Capture Regions on Board code Graph Data Structure & Algorithms
57:10 500
421 Check whether the graph is bipartide or not code Graph Data Structure & Algorithms
58:30 200
422 Clone Graph code Graph Data Structure & Algorithms 49:59 500
423 Commutable Islands code Graph Data Structure & Algorithms 60:43 200
424 Convert Sorted List to Binary Search Tree code Graph Data Structure & Algorithms
38:59 300
425 Count the primes code Graph Data Structure & Algorithms
68:50 200
426 Dijsktra code Graph Data Structure & Algorithms
27:22 200
427 Knight On Chess Board code Graph Data Structure & Algorithms 57:47 300
428 Largest Distance between nodes of a Tree code Graph Data Structure & Algorithms
63:48 200
429 Level Order code Graph Data Structure & Algorithms 27:51 300
430 Maximum Depth code Graph Data Structure & Algorithms
37:09 200
431 Minimum cost to connect cities code Graph Data Structure & Algorithms
58:58 200
432 Most Stones Removed code Graph Data Structure & Algorithms
38:48 200
433 Number of islands code Graph Data Structure & Algorithms
15:26 200
434 Number of islands II code Graph Data Structure & Algorithms
7:53 200
435 Possibility of finishing all courses given pre-requisites code Graph Data Structure & Algorithms 52:15 200
436 Rook Movement code Graph Data Structure & Algorithms
209:46 200
437 Rotten Oranges code Graph Data Structure & Algorithms
28:22 200
438 Shortest Distance from All Buildings code Graph Data Structure & Algorithms
34:59 200
439 Shortest Distance in a Maze code Graph Data Structure & Algorithms
57:36 200
440 Smallest Multiple With 0 and 1 code Graph Data Structure & Algorithms 72:21 300
441 Smallest sequence with given Primes code Graph Data Structure & Algorithms 56:42 200
442 Stepping Numbers code Graph Data Structure & Algorithms 49:47 300
443 Strongly Connected Components code Graph Data Structure & Algorithms
17:27 200
444 Sum Of Fibonacci Numbers code Graph Data Structure & Algorithms
46:27 300
445 Valid Path code Graph Data Structure & Algorithms 74:10 200
446 WiFi Routers New code Graph Data Structure & Algorithms
47:45 200
447 Word Ladder I code Graph Data Structure & Algorithms 57:04 600
448 Word Ladder II code Graph Data Structure & Algorithms 63:34 800
449 Word Search Board code Graph Data Structure & Algorithms 48:42 500
450 0/1 String code Math
64:37 200
451 ALL GCD PAIR New code Math
89:37 200
452 City Tour code Math
54:20 300
453 Compute nCr % m code Math
32:30 200
454 Compute nCr % p code Math
35:29 200
455 Count of divisors for multiple queries code Math
36:32 200
456 Count of paths in a grid code Math
26:30 200
457 Day of the week code Math
18:20 200
458 Divisibility by 8 code Math
10:51 200
459 Excel Column Number code Math 23:19 175
460 Excel Column Title code Math 40:11 175
461 FAMOUS PRODUCT New code Math
44:42 200
462 Find if two rectangles overlap code Math
20:01 200
463 Find nth Magic Number code Math
17:05 200
464 Finding Position code Math
13:18 200
465 FizzBuzz code Math
12:23 200
466 Greatest Common Divisor code Math 10:57 200
467 Grid Unique Paths code Math 32:30 375
468 Largest Coprime Divisor code Math
46:27 250
469 LAST SUBSET PROBLEM New code Math
22:26 200
470 Maximum height of the staircase code Math
13:26 200
471 Number of Digit One code Math
40:27 200
472 Number of Hosts per Subnet New code Math
15:46 200
473 Number Of Open Doors code Math
12:31 200
474 Numbers of length N and value less than K code Math
82:12 200
475 Palindrome Integer code Math
HCL
17:28 200
476 Power Of Two Integers code Math 39:14 250
477 Prime Sum code Math 43:15 150
478 Product array puzzle code Math
9:54 200
479 Rearrange Array code Math
48:58 250
480 Rectangle Area code Math
29:13 200
481 Reverse integer code Math 28:27 200
482 Solve sub-sequences and return OR code Math
14:46 200
483 Sorted Permutation Rank code Math 71:37 250
484 Sorted Permutation Rank with Repeats code Math 62:56 500
485 Sum of all Submatrices code Math
17:48 200
486 Sum of pairwise Hamming Distance code Math
62:14 200
487 SUM OF SQUARES New code Math
30:23 200
488 Trailing Zeros in Factorial code Math 18:50 250
489 Another Coin Problem code Greedy Algorithm
68:24 200
490 Assign Mice to Holes code Greedy Algorithm 20:01 300
491 Bulbs code Greedy Algorithm
21:28 200
492 Bus and Passenger code Greedy Algorithm
30:13 200
493 Byes code Greedy Algorithm
36:55 200
494 Chocolate Distribution code Greedy Algorithm
16:46 200
495 Distribute Candy code Greedy Algorithm 58:40 300
496 Gas Station code Greedy Algorithm 52:17 700
497 Gcd Ordering code Greedy Algorithm
16:48 200
498 Highest Product code Greedy Algorithm 27:51 200
499 Majority Element code Greedy Algorithm 18:15 400
500 Minimum Cost to Hire K Workers code Greedy Algorithm
57:46 200
501 Seats code Greedy Algorithm 67:00 300
502 Kth Smallest Element in a Sorted Matrix New code Heaps And Maps
23:02 200
503 Activity Selection New code Heaps And Maps
23:44 200
504 B Closest Points to Origin code Heaps And Maps
24:15 200
505 Connect ropes with minimum length code Heaps And Maps
13:21 200
506 Distinct Numbers in Window code Heaps And Maps 37:07 600
507 Find Rectangle in binary matrix code Heaps And Maps
25:08 200
508 Good Ranges code Heaps And Maps
73:12 200
509 Job Sequencing New code Heaps And Maps
31:32 200
510 KEEP SWAPPING New code Heaps And Maps
59:17 200
511 Longest Subarray Sum B code Heaps And Maps
38:30 200
512 LRU Cache code Heaps And Maps 67:39 1000
513 Magician and Chocolates code Heaps And Maps
39:22 250
514 Maximum array sum after B negations code Heaps And Maps
35:57 200
515 Median of stream of running integers code Heaps And Maps
39:38 200
516 Meeting rooms code Heaps And Maps
27:28 200
517 Merge K Sorted Lists code Heaps And Maps 41:19 600
518 Minimum Number of Refueling Stops code Heaps And Maps
65:48 200
519 N max pair combinations code Heaps And Maps 68:42 200
520 Subarrays with B Different Integers New code Heaps And Maps
11:46 200
521 Task Scheduler New code Heaps And Maps
48:32 200
522 Ways to form Max Heap code Heaps And Maps 69:29 200
523 Add One To Number code Arrays
43:43 225
524 Alternate positive and negative elements code Arrays
39:30 200
525 Anti Diagonals code Arrays 40:48 225
526 Array with consecutive elements code Arrays
15:52 200
527 Bob and Queries New code Arrays
9:42 200
528 Count of Range Sum code Arrays
63:10 200
529 Count of smaller numbers after self code Arrays
61:32 200
530 Count pairs in array whose sum is divisible by the given number code Arrays
44:02 200
531 Elements which have at-least two greater elements code Arrays
21:41 200
532 Falling Squares code Arrays
56:31 200
533 Find Duplicate in Array code Arrays 40:13 450
534 Find duplicate rows in a binary matrix code Arrays
36:17 200
535 Find Permutation code Arrays
51:15 300
536 Find The Next New code Arrays
62:42 200
537 First Missing Integer code Arrays 64:37 300
538 Flip code Arrays 76:27 400
539 Hotel Bookings Possible code Arrays 64:17 225
540 Inversion count in an array code Arrays
33:05 200
541 KEEP SWAPPING 2 New code Arrays
43:13 200
542 Kth Row of Pascal's Triangle code Arrays
28:23 225
543 Largest Number code Arrays 70:26 225
544 Length of longest consecutive ones code Arrays
35:12 200
545 Max Chunks To Make Sorted code Arrays
22:16 200
546 Max Chunks To Make Sorted II code Arrays
28:42 200
547 Max Distance code Arrays 66:38 250
548 Max Non Negative SubArray code Arrays
57:45 150
549 Max Sum Contiguous Subarray code Arrays 33:39 225
550 Maximum Absolute Difference code Arrays 65:40 250
551 Maximum Consecutive Gap code Arrays 54:45 450
552 Maximum Difference code Arrays
21:40 200
553 Maximum product of an increasing subsequence of size 3 New code Arrays
75:18 200
554 Maximum Unsorted Subarray code Arrays 63:55 250
555 MAXSPPROD code Arrays
81:02 200
556 Merge Intervals code Arrays
78:51 225
557 Merge Overlapping Intervals code Arrays 47:36 225
558 Min Steps in Infinite Grid code Arrays 37:51 150
559 Minimise the maximum difference between the heights code Arrays
29:00 200
560 Minimum Absolute Difference code Arrays
13:26 200
561 Minimum operations of given type to make all elements of a matrix equal code Arrays
42:52 200
562 Minimum Size Subarray Sum code Arrays
30:07 200
563 Minimum Swaps 2 code Arrays
17:36 200
564 Minimum swaps required to bring all elements less than or equal to k together code Arrays
42:40 200
565 Multiple left rotations of the array code Arrays
16:07 200
566 Multiplication of previous and next code Arrays
20:46 200
567 N/3 Repeat Number code Arrays
65:32 600
568 Next Permutation code Arrays 60:49 300
569 Noble Integer code Arrays
43:04 200
570 Number of sextuplets (or six values) that satisfy an equation code Arrays
26:19 200
571 Pascal Triangle code Arrays 26:46 225
572 Rearrange the array code Arrays
36:21 200
573 Repeat and Missing Number Array code Arrays 63:55 350
574 Reverse pairs code Arrays
19:46 200
575 Rotate Matrix code Arrays 59:51 300
576 Rotated Arrays code Arrays
27:29 200
577 Row with maximum number of ones New code Arrays
6:57 200
578 Search in a row wise and column wise sorted matrix code Arrays
14:01 200
579 Set Matrix Zeros code Arrays 47:54 300
580 Simple Queries code Arrays
76:54 300
581 Size three subsequences divisible by B code Arrays
40:10 200
582 Spiral Order Matrix II code Arrays 48:04 225
583 Sub-matrix Sum Queries code Arrays
36:44 200
584 Sum of adjacent elements is always even code Arrays
5:31 200
585 Toeplitz Matrix code Arrays
22:24 200
586 Triplets with Sum between given range code Arrays
66:02 200
587 Wave Array code Arrays 22:08 225