LeetCode Collection
Repeat Lab
Problems solved on multiple dates, grouped into evolution timelines.
150 timelines
Each card opens a problem-specific evolution view with per-attempt deltas and post gallery.
16.11.2023 to 08.03.2026 · 843 days
Uniq bits not in a set
18.02.2024 to 27.12.2025 · 678 days
Most frequent room 0..n for meetings [s,e]
14.11.2023 to 21.11.2025 · 738 days
palindroms subsequences
04.03.2023 to 26.04.2025 · 784 days
Subarrays with min=minK, max=maxK pointers
28.06.2023 to 31.08.2024 · 430 days
Max path in graph
13.12.2023 to 04.08.2026 · 965 days
Count single 1-row-column
02.02.2025 to 23.05.2026 · 475 days
Is array shifted and sorted?
08.08.2023 to 22.05.2026 · 1018 days
Binary search in shifted array
24.09.2024 to 21.05.2026 · 604 days
Longest prefix of pairs
14.01.2025 to 20.05.2026 · 491 days
Duplicates in prefixes
09.03.2024 to 19.05.2026 · 801 days
Min common of two sorted list
05.03.2023 to 18.05.2026 · 1170 days
Min steps to reach end jumping to same value or left or right
23.11.2024 to 06.05.2026 · 529 days
Rotate and simulate gravity in matrix
03.11.2024 to 03.05.2026 · 546 days
Match strings after rotation
26.03.2025 to 28.04.2026 · 398 days
Min ops to make all numbers equal by +-X
31.10.2024 to 14.04.2026 · 530 days
Shortest distances to travel robots to factories
04.09.2024 to 06.04.2026 · 579 days
Farthest robot movement
13.07.2024 to 01.04.2026 · 627 days
Collide LR robots
26.11.2023 to 17.03.2026 · 842 days
Max area of binary matrix, swap columns
19.02.2025 to 14.03.2026 · 388 days
K-th generated abc non-repeating string
24.12.2023 to 05.03.2026 · 802 days
Min flips to make bits alterating
19.10.2024 to 03.03.2026 · 500 days
Kth bit in s=s+1+inv(rev(s)) sequence
29.05.2024 to 26.02.2026 · 638 days
Ops /2+1 to make 1
30.10.2023 to 25.02.2026 · 849 days
Sort
14.02.2023 to 15.02.2026 · 1097 days
Binary strings sum
24.09.2023 to 14.02.2026 · 874 days
Flow in a Pascal's Triangle
26.06.2024 to 09.02.2026 · 593 days
Balance binary search tree
30.07.2024 to 07.02.2026 · 557 days
Min removal to balance 'ab'
09.06.2023 to 31.01.2026 · 967 days
Larger letter in array
27.07.2024 to 29.01.2026 · 551 days
Min cost to convert string
17.11.2023 to 24.01.2026 · 799 days
Min max pair
03.12.2023 to 12.01.2026 · 771 days
Euclid travel distance
13.04.2024 to 11.01.2026 · 638 days
Max all-1 rectangle in 2D matrix stack
31.07.2023 to 10.01.2026 · 894 days
Min removed sum to make strings equal
8.10.2023 to 08.01.2026 · 823 days
Max product of 2 subsequencies
10.12.2022 to 07.01.2026 · 1124 days
Max sumA sumB of a tree split
15.06.2023 to 06.01.2026 · 936 days
Min level max sum in tree
24.11.2024 to 05.01.2026 · 407 days
Max sum after multiply -1 adjacent cells
30.06.2023 to 31.12.2025 · 915 days
Last day top connected to bottom in 2D matrix
09.08.2024 to 30.12.2025 · 508 days
Count 'magic' 3x3 squares
08.06.2023 to 28.12.2025 · 934 days
Count negatives in 2D sorted matrix
29.08.2023 to 26.12.2025 · 850 days
Min close time by customers max volune
09.05.2024 to 25.12.2025 · 595 days
K max values, decreas each pick
08.12.2024 to 23.12.2025 · 380 days
Max at most two non-overlapping events max
3.01.2023 to 20.12.2025 · 1082 days
Count unsorted columns
24.02.2024 to 19.12.2025 · 664 days
Time based secret spread in a graph
28.11.2023 to 14.12.2025 · 747 days
Ways to split pairs of S
13.02.2023 to 07.12.2025 · 1028 days
Odds l..h
27.07.2023 to 01.12.2025 · 858 days
Max time to run n computers with batteries
03.10.2024 to 30.11.2025 · 423 days
Min removal to make sum%p
21.12.2024 to 28.11.2025 · 342 days
Max cuts where every subtree sum %k
30.11.2023 to 08.11.2025 · 709 days
Min steps to make zero by xor 1 or xor rightmost+1
27.12.2023 to 03.11.2025 · 677 days
Min weighted removals to dedup
21.11.2024 to 02.11.2025 · 346 days
Count unseen cells by rays from guards
06.09.2024 to 01.11.2025 · 421 days
Remove an array from linked list
3.01.2024 to 27.10.2025 · 663 days
Count multiplications between rows
02.04.2023 to 08.10.2025 · 920 days
Number of potions spells[i] bigger than success
19.01.2025 to 03.10.2025 · 257 days
Fill water in 3D
7.07.2024 to 01.10.2025 · 451 days
Total drinks with exchange empty for full
03.05.2024 to 23.09.2025 · 508 days
Compare versions x.x.x.x
08.03.2024 to 22.09.2025 · 563 days
Count max-freq elements
17.12.2023 to 17.09.2025 · 640 days
Food rating system: change rating, peek highest by type
13.11.2023 to 11.09.2025 · 668 days
Sort vowels
15.12.2024 to 01.09.2025 · 260 days
Max avg ratio after assigning extra to ratios
5.07.2023 to 24.08.2025 · 781 days
Max 1-subarray after removing one elemnt pointers
27.10.2024 to 20.08.2025 · 297 days
Count square islands of 1
21.03.2023 to 19.08.2025 · 882 days
Count 0-subarrays
25.05.2023 to 17.08.2025 · 815 days
Probability sum of random(1..m) less than n when stop adding at k
23.10.2023 to 15.08.2025 · 662 days
Is number power of 4?
04.12.2023 to 14.08.2025 · 619 days
Max 3-digit in string
19.02.2024 to 9.08.2025 · 537 days
Is int 32 power of 2?
29.07.2023 to 8.08.2025 · 741 days
Probability A empty first plus both empty /2
7.02.2023 to 4.08.2025 · 909 days
Max consequent two-types range
8.09.2023 to 1.08.2025 · 693 days
Pascal's Triangle
14.09.2024 to 30.07.2025 · 319 days
Longest max OR subarray
18.10.2024 to 28.07.2025 · 283 days
Subsequencies with max OR
12.07.2024 to 23.07.2025 · 376 days
Max removals ab=x, ba=y
01.11.2024 to 21.07.2025 · 262 days
No three chars repeats
25.10.2024 to 19.07.2025 · 267 days
Fold folders
15.07.2023 to 8.07.2025 · 724 days
Max top k valued intervals search
6.05.2023 to 29.06.2025 · 785 days
Subsequencies target in 0..min+max search pointers
01.02.2024 to 18.06.2025 · 503 days
List of k-narrow tripplets
09.08.2023 to 13.06.2025 · 674 days
Min max diffs non-overlapped pairs search
22.09.2024 to 09.06.2025 · 260 days
k-th lexicographical number of 1..n
21.09.2024 to 08.06.2025 · 260 days
Generate lexicographical numbers 1..n
14.01.2023 to 05.06.2025 · 873 days
Map by smallest in group from associate s1 with s2
135. Candy
2x13.09.2023 to 02.06.2025 · 628 days
Min candies, fair siblings by ratings
24.01.2023 to 31.05.2025 · 858 days
Shortest path bottom-top in zig-zag matrix with jumps
25.01.2023 to 30.05.2025 · 856 days
Closest common node
09.04.2023 to 26.05.2025 · 778 days
Max color freq path
19.05.2024 to 23.05.2025 · 369 days
Max sum by k-xoring edges
12.06.2024 to 17.05.2025 · 339 days
Sort 0,1,2 array pointers
1.07.2024 to 11.05.2025 · 314 days
odds
24.12.2022 to 05.05.2025 · 863 days
Ways to fill 2xn board with I,L shapes
29.03.2024 to 29.04.2025 · 396 days
Subarrays at least k maxes pointers
13.11.2024 to 19.04.2025 · 157 days
Pairs a + b in lower..upper pointers
09.02.2024 to 06.04.2025 · 422 days
Longest all pairs divisible subset
20.05.2024 to 05.04.2025 · 320 days
Sum of all subsets xors
12.05.2023 to 01.04.2025 · 690 days
Max sum of (points, skip next) pairs
9.07.2023 to 31.03.2025 · 631 days
Max split sum - min split sum of borders
12.07.2023 to 24.01.2025 · 562 days
Nodes without cycles
22.12.2023 to 01.01.2025 · 376 days
Max(left zeros + right ones)
28.03.2023 to 31.12.2024 · 644 days
Min sum buying 1,7,30-days tickets to travel all days programming
13.05.2023 to 30.12.2024 · 597 days
Ways to make 01-string length of low..high programming
16.04.2023 to 29.12.2024 · 623 days
Ways to make target with increasing positions in words programming
24.10.2023 to 25.12.2024 · 428 days
Tree layers maxes
4.02.2023 to 05.10.2024 · 609 days
Is s2 contains permutation of s1? pointers
2.09.2023 to 23.09.2024 · 387 days
Min extra chars to form an s from dictionary programming
6.09.2023 to 08.09.2024 · 368 days
Split LinkedList into k parts list
30.07.2023 to 21.08.2024 · 388 days
Minimum continuous replacements to make a string programming
26.05.2023 to 20.08.2024 · 452 days
Max Alice price taking 1..2m piles optimally with Bob programming
23.05.2023 to 12.08.2024 · 447 days
kth largest in a stream of values
01.03.2023 to 25.07.2024 · 512 days
Sort array using minimum memory
30.04.2023 to 30.06.2024 · 427 days
Remove extra nodes in a connected graph by type 1, 2 and 3=1+2
502. IPO
2x23.02.2023 to 15.06.2024 · 478 days
Max capital by choosing k jobs with profits[] & capital[] given w on start
19.01.2023 to 09.06.2024 · 507 days
Count subarrays divisible by k
22.01.2023 to 22.05.2024 · 486 days
All palindrome partitions programming
03.04.2023 to 04.05.2024 · 397 days
Minimum total boats with at most 2 people & limit weight pointers
22.12.2022 to 28.04.2024 · 493 days
Sums of paths to each leafs in a tree
30.01.2023 to 24.04.2024 · 450 days
nth Tribonacci number f(n + 3) = f(n) + f(n + 1) + f(n + 2)
19.12.2022 to 21.04.2024 · 489 days
Are source and destination connected in graph?
14.03.2023 to 15.04.2024 · 398 days
Sum root-leaf numbers in a Binary Tree
24.11.2022 to 03.04.2024 · 496 days
Does grid have a word path?
19.09.2023 to 24.03.2024 · 187 days
Duplicate single number in 1..n array, no extra memory
5.01.2023 to 18.03.2024 · 438 days
Count non-intersecting intervals
16.01.2023 to 17.03.2024 · 426 days
Insert interval into a sorted intervals array
5.12.2022 to 07.03.2024 · 458 days
Middle of the Linked List
4.09.2023 to 06.03.2024 · 184 days
Detect cycle
10.01.2023 to 26.02.2024 · 412 days
Are two binary trees equal?
26.01.2023 to 23.02.2024 · 393 days
Cheapest travel src -> dst with at most k stops in a directed weighted graph.
23.01.2023 to 22.02.2024 · 395 days
Find who trusts nobody and everybody trusts him in [trust, trusted] array.
3.12.2022 to 07.02.2024 · 431 days
Sort string by char's frequencies.
18.12.2022 to 31.01.2024 · 409 days
Array of distances to the next largest.
17.12.2022 to 30.01.2024 · 409 days
Solve Reverse Polish Notation.
16.12.2022 to 29.01.2024 · 409 days
Queue by 2 stacks.
15.12.2022 to 25.01.2024 · 406 days
Longest common subsequence of two strings.
14.12.2022 to 21.01.2024 · 403 days
Max sum to rob non adjacent items in array.
25.11.2022 to 20.01.2024 · 421 days
Sum of minimums of all array ranges.
13.12.2022 to 19.01.2024 · 402 days
Min sum moving bottom center, left, right in 2D matrix.
12.12.2022 to 18.01.2024 · 402 days
Ways to climb n stairs by 1 or 2 steps.
30.11.2022 to 17.01.2024 · 413 days
Are array frequencies unique.
29.11.2022 to 16.01.2024 · 413 days
Implement HashSet
28.11.2022 to 15.01.2024 · 413 days
[sorted winners list, sorted single lose list]
1.12.2022 to 12.01.2024 · 407 days
Let's use some Kotlin's API
9.12.2022 to 11.01.2024 · 398 days
Max diff between node and ancestor in a binary tree.
8.12.2022 to 9.01.2024 · 397 days
Are leafs sequences equal for two trees.
7.12.2022 to 8.01.2024 · 397 days
Sum of BST in range [low..high].
27.11.2022 to 7.01.2024 · 406 days
Count of arithmetic subsequences.
26.11.2022 to 6.01.2024 · 406 days
Max profit in non-intersecting jobs given startTime[], endTime[] and profit[].
23.08.2023 to 03.11.2023 · 72 days
Non-repeating consequent chars string from another string