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Coding Interview Questions


# Problem Code Type Topic Companies Average Time Score
1 Convert Sorted List to Binary Search Tree code Graph Data Structure & Algorithms
43:26 300
2 Level Order code Graph Data Structure & Algorithms 29:45 300
3 Capture Regions on Board code Graph Data Structure & Algorithms
63:49 500
4 Word Ladder II code Graph Data Structure & Algorithms 61:26 800
5 Clone Graph code Graph Data Structure & Algorithms 54:53 500
6 Word Search Board code Graph Data Structure & Algorithms 56:19 500
7 Word Ladder I code Graph Data Structure & Algorithms 65:12 600
8 Sum Of Fibonacci Numbers code Graph Data Structure & Algorithms
51:11 300
9 Stepping Numbers code Graph Data Structure & Algorithms 56:27 300
10 Black Shapes code Graph Data Structure & Algorithms 48:16 300
11 Knight On Chess Board code Graph Data Structure & Algorithms 65:21 300
12 Smallest Multiple With 0 and 1 code Graph Data Structure & Algorithms 69:08 300
13 Largest Distance between nodes of a Tree code Graph Data Structure & Algorithms
74:05 200
14 Commutable Islands code Graph Data Structure & Algorithms 73:06 200
15 Possibility of finishing all courses given pre-requisites code Graph Data Structure & Algorithms 62:20 200
16 Valid Path code Graph Data Structure & Algorithms 80:44 200
17 Cycle in Directed Graph code Graph Data Structure & Algorithms 44:50 200
18 Cycle in Undirected Graph code Graph Data Structure & Algorithms 43:37 200
19 Snake Ladder Problem! code Graph Data Structure & Algorithms 53:26 200
20 Region in BinaryMatrix code Graph Data Structure & Algorithms 36:21 200
21 Min Cost Path code Graph Data Structure & Algorithms 67:00 300
22 Two teams? code Graph Data Structure & Algorithms 45:35 300
23 Permutation Swaps! code Graph Data Structure & Algorithms 53:21 300
24 Delete Edge! code Graph Data Structure & Algorithms 59:42 200
25 Useful Extra Edges code Graph Data Structure & Algorithms 64:18 400
26 Merge K Sorted Lists code Heaps And Maps 43:30 600
27 LRU Cache code Heaps And Maps 74:03 1000
28 Distinct Numbers in Window code Heaps And Maps 39:05 600
29 Magician and Chocolates code Heaps And Maps
41:52 250
30 Ways to form Max Heap code Heaps And Maps 71:14 200
31 N max pair combinations code Heaps And Maps 76:57 200
32 Find Rectangle in binary matrix code Heaps And Maps
34:26 200
33 Maximum Sum Combinations code Heaps And Maps 40:38 300
34 K Largest Elements code Heaps And Maps 18:03 200
35 Profit Maximisation code Heaps And Maps 17:49 200
36 Swap List Nodes in pairs code Linked Lists 33:34 350
37 Rotate List code Linked Lists 33:58 350
38 Reorder List code Linked Lists 57:10 600
39 Sort List code Linked Lists
58:32 350
40 Remove Duplicates from Sorted List II code Linked Lists 57:51 300
41 Merge Two Sorted Lists code Linked Lists 29:11 300
42 Remove Duplicates from Sorted List code Linked Lists 17:58 300
43 Add Two Numbers as Lists code Linked Lists 43:07 250
44 Remove Nth Node from List End code Linked Lists 27:38 350
45 Partition List code Linked Lists
49:35 275
46 Insertion Sort List code Linked Lists
48:39 300
47 List Cycle code Linked Lists 39:15 600
48 Reverse Link List II code Linked Lists 57:24 450
49 Palindrome List code Linked Lists 47:06 200
50 K reverse linked list code Linked Lists 60:19 200
51 Reverse Alternate K Nodes code Linked Lists 42:42 300
52 Kth Node From Middle code Linked Lists 27:19 200
53 Sort Binary Linked List code Linked Lists 29:16 200
54 Even Reverse code Linked Lists 37:23 200
55 Gas Station code Greedy Algorithm 56:20 700
56 Majority Element code Greedy Algorithm 19:07 400
57 Distribute Candy code Greedy Algorithm 64:18 300
58 Seats code Greedy Algorithm 72:07 300
59 Highest Product code Greedy Algorithm 29:22 200
60 Assign Mice to Holes code Greedy Algorithm 21:11 300
61 Bulbs code Greedy Algorithm
23:02 200
62 Meeting rooms code Greedy Algorithm 51:13 200
63 Largest Permutation code Greedy Algorithm 39:09 250
64 Add Binary Strings code Strings
40:40 300
65 Amazing Subarrays code Strings
26:39 150
66 Atoi code Strings 52:19 250
67 Compare Version Numbers code Strings 66:23 225
68 Convert to Palindrome code Strings 35:25 200
69 Count And Say code Strings 43:00 250
70 Implement StrStr code Strings 33:14 225
71 Integer To Roman code Strings 41:52 250
72 Justified Text code Strings
76:18 300
73 Length of Last Word code Strings 17:54 225
74 Longest Common Prefix code Strings
27:45 225
75 Longest Palindromic Substring code Strings 59:50 500
76 Minimum Appends for Palindrome! code Strings
37:22 200
77 Minimum Characters required to make a String Palindromic code Strings 64:41 200
78 Minimum Parantheses! code Strings
22:10 200
79 Multiply Strings code Strings
63:21 375
80 Palindrome String code Strings
30:40 150
81 Power of 2 code Strings 62:27 350
82 Pretty Json code Strings
63:01 400
83 Remove Consecutive Characters code Strings 34:58 200
84 Reverse the String code Strings 36:31 250
85 Roman To Integer code Strings 33:02 250
86 Stringoholics code Strings
62:26 300
87 Valid Ip Addresses code Strings 65:46 250
88 Valid Number code Strings 58:46 250
89 Vowel and Consonant Substrings! code Strings
29:44 200
90 Zigzag String code Strings
52:32 300
91 Diffk code Two Pointers
29:31 300
92 Intersection Of Sorted Arrays code Two Pointers
18:20 225
93 Merge Two Sorted Lists II code Two Pointers 25:38 200
94 3 Sum code Two Pointers 60:04 225
95 Remove Duplicates from Sorted Array code Two Pointers 31:38 250
96 Sort by Color code Two Pointers
23:13 325
97 Array 3 Pointers code Two Pointers
53:30 400
98 Container With Most Water code Two Pointers 48:23 400
99 3 Sum Zero code Two Pointers
53:48 225
100 Remove Duplicates from Sorted Array II code Two Pointers 33:38 250
101 Remove Element from Array code Two Pointers 28:29 250
102 Max Continuous Series of 1s code Two Pointers 77:25 300
103 Counting Triangles code Two Pointers
63:37 225
104 Minimize the absolute difference code Two Pointers
60:06 200
105 Pair With Given Difference code Two Pointers 33:49 200
106 Maximum Ones After Modification code Two Pointers 43:06 200
107 Inorder Traversal code Tree Data Structure 32:00 350
108 Recover Binary Search Tree code Tree Data Structure 63:18 750
109 Inorder Traversal of Cartesian Tree code Tree Data Structure 50:21 300
110 Least Common Ancestor code Tree Data Structure 57:33 450
111 Construct Binary Tree From Inorder And Preorder code Tree Data Structure 45:46 375
112 Flatten Binary Tree to Linked List code Tree Data Structure 43:30 500
113 Preorder Traversal code Tree Data Structure 15:26 350
114 Max Depth of Binary Tree code Tree Data Structure 6:57 350
115 Binary Tree From Inorder And Postorder code Tree Data Structure 50:05 375
116 Balanced Binary Tree code Tree Data Structure 30:19 275
117 Sorted Array To Balanced BST code Tree Data Structure 28:35 300
118 Sum Root to Leaf Numbers code Tree Data Structure
45:17 350
119 Symmetric Binary Tree code Tree Data Structure 22:00 300
120 Postorder Traversal code Tree Data Structure 31:28 350
121 Populate Next Right Pointers Tree code Tree Data Structure 50:25 900
122 Identical Binary Trees code Tree Data Structure 11:36 300
123 BST Iterator code Tree Data Structure 41:01 500
124 ZigZag Level Order Traversal BT code Tree Data Structure 42:11 350
125 Path Sum code Tree Data Structure 27:35 350
126 Min Depth of Binary Tree code Tree Data Structure 17:20 350
127 Root to Leaf Paths With Sum code Tree Data Structure 41:05 350
128 Order of People Heights code Tree Data Structure
73:38 700
129 Shortest Unique Prefix code Tree Data Structure
68:19 350
130 Invert the Binary Tree code Tree Data Structure
12:46 300
131 Kth Smallest Element In Tree code Tree Data Structure 29:17 300
132 2-Sum Binary Tree code Tree Data Structure 63:27 400
133 Vertical Order traversal of Binary Tree code Tree Data Structure 72:36 200
134 Hotel Reviews code Tree Data Structure 73:01 200
135 Right view of Binary tree code Tree Data Structure 28:25 200
136 Valid BST from Preorder code Tree Data Structure 53:45 100
137 Diagonal Traversal code Tree Data Structure 43:21 200
138 Cousins in Binary Tree code Tree Data Structure 52:27 200
139 Path to Given Node code Tree Data Structure 37:07 200
140 Remove Half Nodes code Tree Data Structure 42:23 200
141 Merge two Binary Tree code Tree Data Structure 27:33 200
142 Reverse Level Order code Tree Data Structure 22:25 249
143 Design Cache subjective Storage Scalability 40:00 200
144 Highly Available Database subjective Storage Scalability 50:00 400
145 Highly Consistent Database subjective Storage Scalability
50:00 400
146 Sharding a Database subjective Storage Scalability 35:00 200
147 Evaluate Expression code Stacks And Queues
32:46 400
148 Rain Water Trapped code Stacks And Queues 59:05 400
149 Largest Rectangle in Histogram code Stacks And Queues 65:51 450
150 Sliding Window Maximum code Stacks And Queues 69:30 450
151 Simplify Directory Path code Stacks And Queues
53:54 250
152 Min Stack code Stacks And Queues 43:31 400
153 Redundant Braces code Stacks And Queues 42:41 300
154 Nearest Smaller Element code Stacks And Queues 41:37 350
155 MAXSPPROD code Stacks And Queues
87:53 200
156 First non-repeating character in a stream of characters code Stacks And Queues 54:03 200
157 Balanced Parantheses! code Stacks And Queues 14:55 200
158 Design Messenger subjective System Design Interview Questions 41:40 600
159 Design Search Typeahead subjective System Design Interview Questions
53:20 400
160 Design Twitter subjective System Design Interview Questions 38:20 600
161 Design URL Shortener subjective System Design Interview Questions 45:00 300
162 OSI Model-1 objective Basics of Computer Networking
11:31 30
163 OSI Model-3 objective Basics of Computer Networking
3:57 30
164 Matrix Search code Binary Search
36:51 250
165 Median of Array code Binary Search 85:52 325
166 Search for a Range code Binary Search
42:02 250
167 Square Root of Integer code Binary Search 40:32 275
168 Implement Power Function code Binary Search
59:44 275
169 Rotated Sorted Array Search code Binary Search 56:53 325
170 Sorted Insert Position code Binary Search
25:03 250
171 Allocate Books code Binary Search
67:23 350
172 Painter's Partition Problem code Binary Search 81:21 350
173 Matrix Median code Binary Search 77:16 225
174 Simple Queries code Binary Search
62:41 300
175 Find a peak element code Binary Search
18:19 200
176 Smaller or equal elements code Binary Search
26:31 200
177 WoodCutting Made Easy! code Binary Search 48:29 200
178 Palindrome Integer code Math
HCL
17:28 200
179 Excel Column Number code Math 23:19 175
180 Reverse integer code Math 28:36 200
181 Excel Column Title code Math 41:11 175
182 Grid Unique Paths code Math 32:35 375
183 Trailing Zeros in Factorial code Math 18:58 250
184 Rearrange Array code Math
49:03 250
185 Greatest Common Divisor code Math 10:57 200
186 Power Of Two Integers code Math 39:36 250
187 Prime Sum code Math 43:15 150
188 Sorted Permutation Rank code Math 77:23 250
189 Sorted Permutation Rank with Repeats code Math 64:50 500
190 Largest Coprime Divisor code Math
49:00 250
191 Sum of pairwise Hamming Distance code Math
66:36 200
192 Numbers of length N and value less than K code Math
89:22 200
193 FizzBuzz code Math
12:34 200
194 City Tour code Math
56:59 300
195 Next Similar Number code Math 49:13 200
196 Is Rectangle? code Math 10:10 200
197 Find Nth Fibonacci code Math
42:28 200
198 Substring Concatenation code Hashing
70:35 1000
199 Window String code Hashing 79:18 350
200 4 Sum code Hashing 70:01 325
201 Anagrams code Hashing 46:36 350
202 Fraction code Hashing 80:08 450
203 Points on the Straight Line code Hashing 75:51 450
204 2 Sum code Hashing 49:18 300
205 Valid Sudoku code Hashing 49:24 325
206 Copy List code Hashing 54:54 450
207 Diffk II code Hashing
28:58 375
208 Longest Substring Without Repeat code Hashing 51:04 350
209 Colorful Number code Hashing 44:55 150
210 Equal code Hashing
70:25 350
211 Largest Continuous Sequence Zero Sum code Hashing
67:36 200
212 Pairs With Given Xor code Hashing 23:36 200
213 Check Palindrome! code Hashing
14:32 200
214 An Increment Problem code Hashing 38:21 200
215 Subarray with given XOR code Hashing 37:36 200
216 Two out of Three code Hashing 29:10 200
217 Subarray with B odd numbers code Hashing 37:54 200
218 Reverse Bits code Bit Manipulation 23:50 225
219 Number of 1 Bits code Bit Manipulation 8:47 200
220 Single Number code Bit Manipulation 11:53 275
221 Divide Integers code Bit Manipulation 66:23 250
222 Single Number II code Bit Manipulation 39:22 275
223 Different Bits Sum Pairwise code Bit Manipulation
50:42 300
224 Min XOR value code Bit Manipulation 37:42 200
225 Count Total Set Bits code Bit Manipulation 55:13 200
226 Palindromic Binary Representation code Bit Manipulation 53:26 200
227 Kth Row of Pascal's Triangle code Arrays
28:32 225
228 Rotate Matrix code Arrays 60:26 300
229 Max Sum Contiguous Subarray code Arrays 33:39 225
230 Find Duplicate in Array code Arrays 40:13 450
231 Merge Intervals code Arrays
78:57 225
232 Repeat and Missing Number Array code Arrays 63:55 350
233 Merge Overlapping Intervals code Arrays 48:24 225
234 Set Matrix Zeros code Arrays 48:04 300
235 Spiral Order Matrix II code Arrays 48:40 225
236 Largest Number code Arrays 70:26 225
237 First Missing Integer code Arrays 64:38 300
238 Add One To Number code Arrays
43:43 225
239 N/3 Repeat Number code Arrays
68:21 600
240 Pascal Triangle code Arrays 26:46 225
241 Maximum Consecutive Gap code Arrays 58:37 450
242 Max Distance code Arrays 68:14 250
243 Next Permutation code Arrays 63:13 300
244 Wave Array code Arrays 22:08 225
245 Anti Diagonals code Arrays 41:46 225
246 Hotel Bookings Possible code Arrays 66:06 225
247 Min Steps in Infinite Grid code Arrays 37:51 150
248 Flip code Arrays 78:22 400
249 Find Permutation code Arrays 55:54 300
250 Maximum Absolute Difference code Arrays 65:51 250
251 Maximum Unsorted Subarray code Arrays 68:47 250
252 Noble Integer code Arrays
43:30 200
253 Triplets with Sum between given range code Arrays
74:48 200
254 Partitions code Arrays 69:16 300
255 Multiple left rotations of the array code Arrays 21:50 200
256 Minimum Lights to Activate code Arrays 62:03 200
257 Maximum Sum Triplet code Arrays 66:30 200
258 Maximum Sum Square SubMatrix code Arrays 46:05 300
259 Maximum Area of Triangle! code Arrays 50:09 350
260 Perfect Peak of Array code Arrays 44:35 200
261 Leaders in an array code Arrays 19:05 200
262 NESTED_CMPL2 objective Time Complexity
1:25 30
263 CHOOSE3 objective Time Complexity
1:39 50
264 NESTED_CMPL3 objective Time Complexity
3:56 80
265 CHOOSE4 objective Time Complexity
0:57 50
266 AMORTIZED1 objective Time Complexity
3:03 100
267 CHOOSE2 objective Time Complexity
2:23 80
268 GCD_CMPL objective Time Complexity
4:13 150
269 LOOP_CMPL2 objective Time Complexity
2:43 80
270 WHILE_CMPL objective Time Complexity
1:31 50
271 CHOOSE1 objective Time Complexity
1:43 50
272 LOOP_CMPL objective Time Complexity
2:43 20
273 NESTED_CMPL objective Time Complexity
1:10 20
274 REC_CMPL1 objective Time Complexity
6:58 80
275 REC_CMPL2 objective Time Complexity
6:25 80
276 REC_CMPL3 objective Time Complexity
4:39 150
277 All Unique Permutations code Backtracking
51:09 200
278 Kth Permutation Sequence code Backtracking 74:14 350
279 Combination Sum code Backtracking 62:06 300
280 Permutations code Backtracking 39:38 350
281 Generate all Parentheses II code Backtracking
52:08 350
282 Combination Sum II code Backtracking 41:22 300
283 NQueens code Backtracking 73:58 550
284 Combinations code Backtracking 45:56 300
285 Sudoku code Backtracking 68:01 700
286 Gray Code code Backtracking
57:36 350
287 Subsets II code Backtracking 40:29 300
288 Letter Phone code Backtracking 53:24 250
289 Subset code Backtracking 61:56 250
290 Palindrome Partitioning code Backtracking 67:36 300
291 Maximal String code Backtracking
47:59 200
292 Actors and their Movies sql SQL Programming
34:53 100
293 Movie Character sql SQL Programming
32:50 100
294 Neutral Reviewers sql SQL Programming
23:59 100
295 Short Films sql SQL Programming
28:48 100
296 Longest Increasing Subsequence code Dynamic Programming 30:39 300
297 Max Rectangle in Binary Matrix code Dynamic Programming
75:56 350
298 Distinct Subsequences code Dynamic Programming
63:53 325
299 Unique Paths in a Grid code Dynamic Programming
33:19 300
300 Max Product Subarray code Dynamic Programming 63:38 300
301 Ways to Decode code Dynamic Programming 69:41 225
302 Best Time to Buy and Sell Stocks II code Dynamic Programming 40:03 225
303 Best Time to Buy and Sell Stocks III code Dynamic Programming 60:54 700
304 Scramble String code Dynamic Programming
63:04 500
305 Best Time to Buy and Sell Stocks I code Dynamic Programming 27:54 300
306 Max Sum Path in Binary Tree code Dynamic Programming 54:04 400
307 Regular Expression Match code Dynamic Programming
71:32 500
308 Dungeon Princess code Dynamic Programming
66:09 300
309 Palindrome Partitioning II code Dynamic Programming 59:26 400
310 Min Sum Path in Matrix code Dynamic Programming 30:15 300
311 Min Jumps Array code Dynamic Programming 70:23 300
312 Edit Distance code Dynamic Programming 47:00 300
313 Unique Binary Search Trees II code Dynamic Programming 35:00 400
314 Word Break code Dynamic Programming
IBM
64:25 400
315 Regular Expression II code Dynamic Programming
63:15 500
316 Min Sum Path in Triangle code Dynamic Programming
42:08 300
317 Jump Game Array code Dynamic Programming 41:06 225
318 Interleaving Strings code Dynamic Programming
59:57 500
319 Word Break II code Dynamic Programming
IBM
64:22 350
320 Longest valid Parentheses code Dynamic Programming
58:59 700
321 Stairs code Dynamic Programming 15:14 225
322 Max Sum Without Adjacent Elements code Dynamic Programming 57:12 225
323 Repeating Sub-Sequence code Dynamic Programming
63:22 300
324 Evaluate Expression To True code Dynamic Programming 65:02 350
325 Coins in a Line code Dynamic Programming
61:23 300
326 Arrange II code Dynamic Programming 67:06 350
327 Equal Average Partition code Dynamic Programming 75:42 350
328 Coin Sum Infinite code Dynamic Programming
62:54 225
329 Rod Cutting code Dynamic Programming
69:08 350
330 Intersecting Chords in a Circle code Dynamic Programming
67:12 300
331 Count Permutations of BST code Dynamic Programming
66:03 400
332 Queen Attack code Dynamic Programming
62:39 350
333 Longest Arithmetic Progression code Dynamic Programming
71:44 200
334 Sub Matrices with sum Zero code Dynamic Programming
69:20 200
335 N digit numbers with digit sum S code Dynamic Programming
70:32 200
336 Length of Longest Subsequence code Dynamic Programming
64:58 200
337 Shortest common superstring code Dynamic Programming
63:56 200
338 Flip Array code Dynamic Programming
70:06 200
339 Smallest sequence with given Primes code Dynamic Programming 63:52 200
340 Ways to color a 3xN Board code Dynamic Programming 59:00 200
341 Tushar's Birthday Bombs code Dynamic Programming
74:43 200
342 Tushar's Birthday Party code Dynamic Programming 66:02 200
343 Kth Manhattan Distance Neighbourhood code Dynamic Programming 57:58 200
344 Largest area of rectangle with permutations code Dynamic Programming 72:41 200
345 Kingdom War code Dynamic Programming
54:19 200
346 Longest Common Subsequence code Dynamic Programming 39:32 200
347 Longest Palindromic Subsequence code Dynamic Programming
38:12 200
348 Best Time to Buy and Sell Stock atmost B times code Dynamic Programming 57:18 200
349 Maximum Path in Triangle code Dynamic Programming 28:10 200
350 0-1 Knapsack code Dynamic Programming 42:03 200
351 Chain of Pairs code Dynamic Programming 33:36 200
352 Maximum Size Square Sub-matrix code Dynamic Programming 33:08 200
353 Tiling With Dominoes code Dynamic Programming 51:34 200
354 Increasing Path in Matrix code Dynamic Programming
36:08 200
355 Convert Integer To Roman Number shell Regex and Functions
29:55 400
356 Sort by Frequency shell Regex and Functions
32:26 250
357 Swap Forward And Backward Slash shell Regex and Functions
14:37 200
358 Valid Email Address shell Regex and Functions
30:46 350
359 100 People in a Circle objective Puzzles
12:39 40
360 Ants on a Triangle objective Puzzles
5:01 40
361 Arrange Cubes objective Puzzles
17:11 40
362 Bee Travel objective Puzzles
8:48 40
363 Blindfolded Coin Toss objective Puzzles
3:31 40
364 Breaking Chocolate Bars objective Puzzles
5:20 40
365 Cats and a Square objective Puzzles
8:23 40
366 Celebrity Problem objective Puzzles
9:22 40
367 Color of the Bear objective Puzzles
3:37 40
368 Color of the last ball objective Puzzles
5:30 40
369 Color of the last ball II objective Puzzles
3:23 40
370 Cross the Bridge objective Puzzles
9:20 40
371 Cross the Bridge II objective Puzzles
5:48 40
372 Daughters' Ages objective Puzzles
12:35 40
373 Dinner Hand Shakes objective Puzzles
7:24 40
374 Divide Gold Bar objective Puzzles 6:10 40
375 Divide the Cake objective Puzzles
3:04 40
376 Eggs and Building objective Puzzles 14:02 40
377 Equilateral Triangles using Toothpicks objective Puzzles
6:11 40
378 Fake Note objective Puzzles
5:43 40
379 Fastest Horses objective Puzzles
7:26 40
380 Find the Defective Ball objective Puzzles
6:46 40
381 Find the Defective Ball II objective Puzzles
3:10 40
382 Gates of Heaven objective Puzzles
8:24 40
383 Genie and Hats objective Puzzles
7:50 40
384 Good Processor objective Puzzles
8:14 40
385 Helium Balloon objective Puzzles
1:55 40
386 Jelly Beans Jars objective Puzzles
7:51 40
387 Last Palindromic Date objective Puzzles
11:37 40
388 Light Switches in the Cellar objective Puzzles 3:02 40
389 Make a Statement objective Puzzles 4:25 40
390 Marbles in Jar objective Puzzles
11:46 40
391 Measure Milk by Cans objective Puzzles 16:02 40
392 Measure Time by Burning Ropes objective Puzzles
7:02 40
393 Measure Time by Hourglass objective Puzzles
9:26 40
394 Medicine Chest on a Boat objective Puzzles
9:27 40
395 Min Elevator Trips objective Puzzles
21:36 40
396 Monkeys and Doors objective Puzzles 11:35 40
397 Next Number objective Puzzles
18:20 40
398 Next Number II objective Puzzles 3:13 40
399 One Mile on the Globe objective Puzzles
7:56 40
400 Prisoners and Poison objective Puzzles 18:17 40
401 Quarters on a Table objective Puzzles
5:10 40
402 Ratio of Boys and Girls objective Puzzles
15:32 40
403 Six Colored Cubes objective Puzzles
13:58 40
404 Spider's Web objective Puzzles 3:43 40
405 Spinning Disc's Direction objective Puzzles
7:33 40
406 Ten Black and White Socks objective Puzzles
4:21 40
407 The Tribe objective Puzzles 6:21 40
408 Train Station objective Puzzles
19:11 40
409 Two Numbers objective Puzzles
12:42 40
410 Two Pills each day objective Puzzles
3:27 40
411 Wizards and Drawves objective Puzzles
13:03 40
412 World Trips objective Puzzles
9:42 40
413 Lines in a given range shell Basic Shell Commands
28:48 200
414 Valid phone number shell Basic Shell Commands
21:29 150
415 Transform CSV shell Basic Shell Commands
19:44 300
416 Remove Punctuations shell Basic Shell Commands
12:31 250