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