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