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