solutions

This repo stores my problem-solving related code

leetcode: @dimaglushkov
codeforces: @dimaglushkov

Table of Contents

1. tools
2. contests
3. leetcode
4. adventofcode/2025
5. adventofcode/2024
6. adventofcode/2022
7. codeforces
8. acm.timus

tools

This repository provides a collection of simple and effective tools to simplify solutions management. These utilities enable you to:

• Automatically fetch problems from LeetCode and Codeforces, and generate solution templates.
• Automatically update your list of completed solutions.
• Obtain basic statistics on the distribution of your solved problems.

For more information, check tools.

contests

Leetcode Rating History

Codeforces Rating History

Name	Rank	Solutions	Date
Leetcode Weekly Contest 290	4827 / 19491	solutions	24 apr 2022
Leetcode Biweekly Contest 77	6802 / 15519	solutions	30 apr 2022
Leetcode Weekly Contest 291	6157 / 19223	solutions	1 may 2022
Codeforces Round #790 (Div. 4)	7449 / 17743	solutions	10 may 2022
Codeforces Round #799 (Div. 4)	3515 / 20701	solutions	14 jun 2022
Codeforces Round #811 (Div. 3)	3021 / 15748	solutions	1 aug 2022
Leetcode Biweekly Contest 85	2962 / 23603	solutions	20 aug 2022
Codeforces Round #820 (Div. 3)	4833 / 18417	solutions	13 sep 2022
Codeforces Round #826 (Div. 3)	3102 / 17198	solutions	11 oct 2022
Codeforces Round #828 (Div. 3)	2398 / 14451	solutions	16 oct 2022
Codeforces Round #832 (Div. 2)	3690 / 13689	solutions	4 nov 2022
Leetcode Weekly Contest 320	7599 / 20861	solutions	20 nov 2022
Codeforces Round #835 (Div. 4)	702 / 19245	solutions	22 nov 2022
Leetcode Weekly Contest 321	6122 / 17826	solutions	27 nov 2022
Leetcode Weekly Contest 322	2403 / 19626	solutions	4 dec 2022
Leetcode Biweekly Contest 93	3107 / 17080	solutions	10 dec 2022
Educational Codeforces Round 139 (Rated for Div. 2)	2805 / 13189	solutions	12 dec 2022
Codeforces Round #839 (Div. 3)	722 / 8714	solutions	18 dec 2022
Leetcode Weekly Contest 332	1633 / 24102	solutions	12 feb 2023
Leetcode Biweekly Contest 98	3761 / 22683	solutions	18 feb 2023
Leetcode Weekly Contest 333	6411 / 21701	solutions	19 feb 2023
Codeforces Round #855 (Div. 3)	833 / 10200	solutions	2 mar 2023
Leetcode Biweekly Contest 99	4577 / 21264	solutions	4 mar 2023
Codeforces Round 856 (Div. 2)	2389 / 8430	solutions	4 mar 2023
Leetcode Biweekly Contest 100	2856 / 22847	solutions	18 mar 2023
Codeforces Round 860 (Div. 2)	1103 / 8764	solutions	26 mar 2023
Leetcode Biweekly Contest 101	4291 / 22282	solutions	1 apr 2023

leetcode

Problems solved in total: 623

Solutions by difficulty	Solutions by tags

Problem	Difficulty	Solution
1. Two sum	Easy	golang, python
9. Palindrome number	Easy	golang
2. Add two numbers	Medium	golang
3. Longest substring without repeating characters	Medium	golang
4. Median of two sorted arrays	Hard	golang
14. Longest common prefix	Easy	golang
13. Roman to integer	Easy	golang
28. Implement strstr	Easy	golang
459. Repeated substring pattern	Easy	golang
37. Sudoku solver	Hard	golang
36. Valid sudoku	Medium	golang
8. String to integer atoi	Medium	golang
2042. Check if numbers are ascending in a sentence	Easy	golang
53. Maximum subarray	Easy	golang
192. Word frequency	Medium	bash
338. Counting bits	Easy	golang
33. Search in rotated sorted array	Medium	golang
70. Climbing stairs	Easy	golang
118. Pascals triangle	Easy	golang
75. Sort colors	Medium	golang
15. 3sum	Medium	golang
392. Is subsequence	Easy	golang
20. Valid parentheses	Easy	golang, python
71. Simplify path	Medium	golang, python
413. Arithmetic slices	Medium	golang
21. Merge two sorted lists	Easy	golang
141. Linked list cycle	Easy	golang
344. Reverse string	Easy	golang
680. Valid palindrome ii	Easy	golang
1791. Find center of star graph	Easy	golang
797. All paths from source to target	Medium	golang
31. Next permutation	Medium	golang
1920. Build array from permutation	Easy	golang
1929. Concatenation of array	Easy	golang
1721. Swapping nodes in a linked list	Medium	golang
11. Container with most water	Medium	golang
923. 3sum with multiplicity	Medium	golang
1046. Last stone weight	Easy	golang, python
146. Lru cache	Medium	golang
703. Kth largest element in a stream	Easy	golang
460. Lfu cache	Hard	golang
1480. Running sum of 1d array	Easy	golang
1672. Richest customer wealth	Easy	golang
2011. Final value of variable after performing operations	Easy	golang
2114. Maximum number of words found in sentences	Easy	golang
1108. Defanging an ip address	Easy	golang
1476. Subrectangle queries	Medium	golang
347. Top k frequent elements	Medium	golang
17. Letter combinations of a phone number	Medium	golang
682. Baseball game	Easy	golang
980. Unique paths iii	Hard	golang, python
1603. Design parking system	Easy	golang
1260. Shift 2d grid	Easy	golang
289. Game of life	Medium	golang
59. Spiral matrix ii	Medium	golang
1557. Minimum number of vertices to reach all nodes	Medium	golang
700. Search in a binary search tree	Easy	golang
669. Trim a binary search tree	Medium	golang
538. Convert bst to greater tree	Medium	golang
2236. Root equals sum of children	Easy	golang
2235. Add two integers	Easy	golang
1470. Shuffle the array	Easy	golang
912. Sort an array	Medium	golang
897. Increasing order search tree	Easy	golang
230. Kth smallest element in a bst	Medium	golang
1769. Minimum number of operations to move all balls to each box	Medium	golang
1137. N th tribonacci number	Easy	golang
139. Word break	Medium	golang
509. Fibonacci number	Easy	golang
1614. Maximum nesting depth of the parentheses	Easy	golang
99. Recover binary search tree	Medium	golang
173. Binary search tree iterator	Medium	golang
69. Sqrtx	Easy	golang
7. Reverse integer	Medium	golang
18. 4sum	Medium	golang
695. Max area of island	Medium	golang
153. Find minimum in rotated sorted array	Medium	golang
705. Design hashset	Easy	golang
706. Design hashmap	Easy	golang
535. Encode and decode tinyurl	Medium	golang
187. Repeated dna sequences	Medium	golang
6. Zigzag conversion	Medium	golang
5. Longest palindromic substring	Medium	golang
2181. Merge nodes in between zeros	Medium	golang
1396. Design underground system	Medium	golang
23. Merge k sorted lists	Hard	golang
16. 3sum closest	Medium	golang
2248. Intersection of multiple arrays	Easy	golang
2249. Count lattice points inside a circle	Medium	golang
284. Peeking iterator	Medium	golang
19. Remove nth node from end of list	Medium	golang
22. Generate parentheses	Medium	golang
24. Swap nodes in pairs	Medium	golang
1584. Min cost to connect all points	Medium	golang
46. Permutations	Medium	golang
39. Combination sum	Medium	golang
34. Find first and last position of element in sorted array	Medium	golang
1202. Smallest string with swaps	Medium	golang
128. Longest consecutive sequence	Medium	golang
547. Number of provinces	Medium	golang, python
200. Number of islands	Medium	golang
104. Maximum depth of binary tree	Easy	golang
1631. Path with minimum effort	Medium	golang
1512. Number of good pairs	Easy	golang
1431. Kids with the greatest number of candies	Easy	golang
1281. Subtract the product and sum of digits of an integer	Easy	golang
1155. Number of dice rolls with target sum	Medium	golang
785. Is graph bipartite	Medium	golang
1573. Number of ways to split a string	Medium	golang
399. Evaluate division	Medium	golang
844. Backspace string compare	Easy	golang
2255. Count prefixes of a given string	Easy	golang
2256. Minimum average difference	Medium	golang
2259. Remove digit from number to maximize result	Easy	golang
2260. Minimum consecutive cards to pick up	Medium	golang
48. Rotate image	Medium	golang
905. Sort array by parity	Easy	golang
581. Shortest unsorted continuous subarray	Medium	golang
1679. Max number of k sum pairs	Medium	golang
225. Implement stack using queues	Easy	golang
27. Remove element	Easy	golang
1209. Remove all adjacent duplicates in string ii	Medium	golang
456. 132 pattern	Medium	golang
409. Longest palindrome	Easy	golang
561. Array partition i	Easy	golang
341. Flatten nested list iterator	Medium	golang
216. Combination sum iii	Medium	golang
47. Permutations ii	Medium	golang
1641. Count sorted vowel strings	Medium	golang
117. Populating next right pointers in each node ii	Medium	golang
1302. Deepest leaves sum	Medium	golang
191. Number of 1 bits	Easy	golang
1342. Number of steps to reduce a number to zero	Easy	golang
268. Missing number	Easy	golang
318. Maximum product of word lengths	Medium	golang
29. Divide two integers	Medium	golang
1461. Check if a string contains all binary codes of size k	Medium	golang
867. Transpose matrix	Easy	golang
304. Range sum query 2d immutable	Medium	golang
160. Intersection of two linked lists	Easy	golang
88. Merge sorted array	Easy	golang
1332. Remove palindromic subsequences	Easy	golang
51. N queens	Hard	golang
52. N queens ii	Hard	golang
167. Two sum ii input array is sorted	Medium	golang
1695. Maximum erasure value	Medium	golang
120. Triangle	Medium	golang
583. Delete operation for two strings	Medium	golang
1048. Longest string chain	Medium	golang
242. Valid anagram	Easy	golang
62. Unique paths	Medium	golang
378. Kth smallest element in a sorted matrix	Medium	golang
729. My calendar i	Medium	golang
858. Mirror reflection	Medium	golang
377. Combination sum iv	Medium	golang
458. Poor pigs	Hard	golang
300. Longest increasing subsequence	Medium	golang
1220. Count vowels permutation	Hard	golang
823. Binary trees with factors	Medium	golang
108. Convert sorted array to binary search tree	Easy	golang
98. Validate binary search tree	Medium	golang
235. Lowest common ancestor of a binary search tree	Easy	golang
387. First unique character in a string	Easy	golang
804. Unique morse code words	Easy	golang
1338. Reduce array size to the half	Medium	golang
659. Split array into consecutive subsequences	Medium	golang
342. Power of four	Easy	golang
234. Palindrome linked list	Easy	golang
326. Power of three	Easy	golang
383. Ransom note	Easy	golang
869. Reordered power of 2	Medium	golang
2379. Minimum recolors to get k consecutive black blocks	Easy	golang
2380. Time needed to rearrange a binary string	Medium	golang
2381. Shifting letters ii	Medium	golang
126. Word ladder ii	Hard	golang
363. Max sum of rectangle no larger than k	Hard	golang
1578. Minimum time to make rope colorful	Medium	golang
91. Decode ways	Medium	golang
112. Path sum	Easy	golang
623. Add one row to tree	Medium	golang
981. Time based key value store	Medium	golang
732. My calendar iii	Hard	golang
653. Two sum iv input is a bst	Easy	golang
1328. Break a palindrome	Medium	golang
334. Increasing triplet subsequence	Medium	golang
121. Best time to buy and sell stock	Easy	golang
125. Valid palindrome	Easy	golang
226. Invert binary tree	Easy	golang
704. Binary search	Easy	golang
733. Flood fill	Easy	golang
976. Largest perimeter triangle	Easy	golang
237. Delete node in a linked list	Medium	golang
2095. Delete the middle node of a linked list	Medium	golang
1531. String compression ii	Hard	golang
110. Balanced binary tree	Easy	golang
232. Implement queue using stacks	Easy	golang
278. First bad version	Easy	golang
206. Reverse linked list	Easy	golang
169. Majority element	Easy	golang
67. Add binary	Easy	golang
1832. Check if the sentence is pangram	Easy	golang
543. Diameter of binary tree	Easy	golang
876. Middle of the linked list	Easy	golang
217. Contains duplicate	Easy	golang
38. Count and say	Medium	golang
542. 01 matrix	Medium	golang
57. Insert interval	Medium	golang
692. Top k frequent words	Medium	golang
12. Integer to roman	Medium	golang
973. K closest points to origin	Medium	golang
433. Minimum genetic mutation	Medium	golang
2131. Longest palindrome by concatenating two letter words	Medium	golang
345. Reverse vowels of a string	Easy	golang
212. Word search ii	Hard	golang
899. Orderly queue	Hard	golang
208. Implement trie prefix tree	Medium	golang
211. Design add and search words data structure	Medium	golang
1323. Maximum 69 number	Easy	golang
102. Binary tree level order traversal	Medium	golang
133. Clone graph	Medium	golang
150. Evaluate reverse polish notation	Medium	golang
207. Course schedule	Medium	golang
1544. Make the string great	Easy	golang
322. Coin change	Medium	golang
238. Product of array except self	Medium	golang
155. Min stack	Medium	golang
994. Rotting oranges	Medium	golang
901. Online stock span	Medium	golang
1047. Remove all adjacent duplicates in string	Easy	golang
26. Remove duplicates from sorted array	Easy	golang
151. Reverse words in a string	Medium	golang
947. Most stones removed with same row or column	Medium	golang, python
222. Count complete tree nodes	Medium	golang
56. Merge intervals	Medium	golang
374. Guess number higher or lower	Easy	golang
236. Lowest common ancestor of a binary tree	Medium	golang
721. Accounts merge	Medium	golang
223. Rectangle area	Medium	golang
416. Partition equal subset sum	Medium	golang
263. Ugly number	Easy	golang
2395. Find subarrays with equal sum	Easy	golang
224. Basic calculator	Hard	golang
279. Perfect squares	Medium	golang
2475. Number of unequal triplets in array	Easy	golang
2476. Closest nodes queries in a binary search tree	Medium	golang
79. Word search	Medium	golang
907. Sum of subarray minimums	Medium	golang
2485. Find the pivot integer	Easy	golang
2486. Append characters to string to make subsequence	Medium	golang
2487. Remove nodes from linked list	Medium	golang
2225. Find players with zero or one losses	Medium	golang
587. Erect the fence	Hard	golang
380. Insert delete getrandom o1	Medium	golang
1207. Unique number of occurrences	Easy	golang
1704. Determine if string halves are alike	Easy	golang
1657. Determine if two strings are close	Medium	golang
451. Sort characters by frequency	Medium	golang
1752. Check if array is sorted and rotated	Easy	golang
35. Search insert position	Easy	golang
58. Length of last word	Easy	golang
66. Plus one	Easy	golang
83. Remove duplicates from sorted list	Easy	golang
94. Binary tree inorder traversal	Easy	golang
100. Same tree	Easy	golang
101. Symmetric tree	Easy	golang
111. Minimum depth of binary tree	Easy	golang
119. Pascals triangle ii	Easy	golang
136. Single number	Easy	golang
144. Binary tree preorder traversal	Easy	golang
145. Binary tree postorder traversal	Easy	golang
168. Excel sheet column title	Easy	golang
171. Excel sheet column number	Easy	golang
190. Reverse bits	Easy	golang
202. Happy number	Easy	golang
203. Remove linked list elements	Easy	golang
205. Isomorphic strings	Easy	golang
228. Summary ranges	Easy	golang
258. Add digits	Easy	golang, python
328. Odd even linked list	Medium	golang
938. Range sum of bst	Easy	golang
1689. Partitioning into minimum number of deci binary numbers	Medium	golang
1828. Queries on number of points inside a circle	Medium	golang
807. Max increase to keep city skyline	Medium	golang
40. Combination sum ii	Medium	golang
2490. Circular sentence	Easy	golang
2491. Divide players into teams of equal skill	Medium	golang
2492. Minimum score of a path between two cities	Medium	golang
872. Leaf similar trees	Easy	golang
1026. Maximum difference between node and ancestor	Medium	golang
1339. Maximum product of splitted binary tree	Medium	golang
2496. Maximum value of a string in an array	Easy	golang
2497. Maximum star sum of a graph	Medium	golang
2498. Frog jump ii	Medium	golang
124. Binary tree maximum path sum	Hard	golang
931. Minimum falling path sum	Medium	golang
198. House robber	Medium	golang
231. Power of two	Easy	golang
257. Binary tree paths	Easy	golang
283. Move zeroes	Easy	golang
290. Word pattern	Easy	golang
1143. Longest common subsequence	Medium	golang
1971. Find if path exists in graph	Easy	golang
841. Keys and rooms	Medium	golang
309. Best time to buy and sell stock with cooldown	Medium	golang
790. Domino and tromino tiling	Medium	golang
55. Jump game	Medium	golang
2389. Longest subsequence with limited sum	Easy	golang
2279. Maximum bags with full capacity of rocks	Medium	golang
1962. Remove stones to minimize the total	Medium	golang
520. Detect capital	Easy	golang
944. Delete columns to make sorted	Easy	golang
2244. Minimum rounds to complete all tasks	Medium	golang
452. Minimum number of arrows to burst balloons	Medium	golang
1833. Maximum ice cream bars	Medium	golang
134. Gas station	Medium	golang
1519. Number of nodes in the sub tree with the same label	Medium	golang
1061. Lexicographically smallest equivalent string	Medium	golang
1071. Greatest common divisor of strings	Easy	golang
953. Verifying an alien dictionary	Easy	golang
567. Permutation in string	Medium	golang
438. Find all anagrams in a string	Medium	golang
904. Fruit into baskets	Medium	golang
45. Jump game ii	Medium	golang
54. Spiral matrix	Medium	golang
78. Subsets	Medium	golang
199. Binary tree right side view	Medium	golang
2306. Naming a company	Hard	golang
1162. As far from land as possible	Medium	golang
1129. Shortest path with alternating colors	Medium	golang
2565. Subsequence with the minimum score	Hard	golang
2562. Find the array concatenation value	Easy	golang
2563. Count the number of fair pairs	Medium	golang
2564. Substring xor queries	Medium	golang
2477. Minimum fuel cost to report to the capital	Medium	golang
1523. Count odd numbers in an interval range	Easy	golang
349. Intersection of two arrays	Easy	golang
350. Intersection of two arrays ii	Easy	golang
367. Valid perfect square	Easy	golang
389. Find the difference	Easy	golang
404. Sum of left leaves	Easy	golang
405. Convert a number to hexadecimal	Easy	golang
412. Fizz buzz	Easy	golang
414. Third maximum number	Easy	golang
415. Add strings	Easy	golang
434. Number of segments in a string	Easy	golang
441. Arranging coins	Easy	golang
448. Find all numbers disappeared in an array	Easy	golang
68. Text justification	Hard	golang
989. Add to array form of integer	Easy	golang
783. Minimum distance between bst nodes	Easy	golang
2566. Maximum difference by remapping a digit	Easy	golang
2567. Minimum score by changing two elements	Medium	golang
2568. Minimum impossible or	Medium	golang
2570. Merge two 2d arrays by summing values	Easy	golang
2571. Minimum operations to reduce an integer to 0	Medium	golang
103. Binary tree zigzag level order traversal	Medium	golang
540. Single element in a sorted array	Medium	golang
1011. Capacity to ship packages within d days	Medium	golang
502. Ipo	Hard	golang
1675. Minimize deviation in array	Hard	golang
2574. Left and right sum differences	Easy	golang
72. Edit distance	Hard	golang
427. Construct quad tree	Medium	golang
2558. Take gifts from the richest pile	Easy	golang
2553. Separate the digits in an array	Easy	golang
2549. Count distinct numbers on board	Easy	golang
2544. Alternating digit sum	Easy	golang
652. Find duplicate subtrees	Medium	golang
718. Maximum length of repeated subarray	Medium	golang
443. String compression	Medium	golang
2554. Maximum number of integers to choose from a range i	Medium	golang
2555. Maximize win from two segments	Medium	golang
2444. Count subarrays with fixed bounds	Hard	golang
2578. Split with minimum sum	Easy	golang
2579. Count total number of colored cells	Medium	golang
2580. Count ways to group overlapping ranges	Medium	golang
1345. Jump game iv	Hard	golang
1539. Kth missing positive number	Easy	golang
875. Koko eating bananas	Medium	golang
2187. Minimum time to complete trips	Medium	golang
724. Find pivot index	Easy	golang
74. Search a 2d matrix	Medium	golang
240. Search a 2d matrix ii	Medium	golang
142. Linked list cycle ii	Medium	golang
382. Linked list random node	Medium	golang
109. Convert sorted list to binary search tree	Medium	golang
1122. Relative sort array	Easy	golang
589. N ary tree preorder traversal	Easy	golang
386. Lexicographical numbers	Medium	golang
1051. Height checker	Easy	golang
129. Sum root to leaf numbers	Medium	golang
958. Check completeness of a binary tree	Medium	golang
49. Group anagrams	Medium	golang
50. Powx n	Medium	golang
106. Construct binary tree from inorder and postorder traversal	Medium	golang
73. Set matrix zeroes	Medium	golang
105. Construct binary tree from preorder and inorder traversal	Medium	golang
116. Populating next right pointers in each node	Medium	golang
122. Best time to buy and sell stock ii	Medium	golang
130. Surrounded regions	Medium	golang
1472. Design browser history	Medium	golang
746. Min cost climbing stairs	Easy	golang
2591. Distribute money to maximum children	Easy	golang
2592. Maximize greatness of an array	Medium	golang
2594. Minimum time to repair cars	Medium	golang
605. Can place flowers	Easy	golang
2348. Number of zero filled subarrays	Medium	python
292. Nim game	Easy	golang
303. Range sum query immutable	Easy	golang
461. Hamming distance	Easy	golang
455. Assign cookies	Easy	golang
1319. Number of operations to make network connected	Medium	golang
1466. Reorder routes to make all paths lead to the city zero	Medium	golang
2316. Count unreachable pairs of nodes in an undirected graph	Medium	golang
2360. Longest cycle in a graph	Hard	golang
64. Minimum path sum	Medium	golang
983. Minimum cost for tickets	Medium	golang
1402. Reducing dishes	Hard	golang
87. Scramble string	Hard	golang
2605. Form smallest number from two digit arrays	Easy	golang
2606. Find the substring with maximum cost	Medium	golang
2300. Successful pairs of spells and potions	Medium	golang
881. Boats to save people	Medium	golang
771. Jewels and stones	Easy	python, golang
2405. Optimal partition of string	Medium	python
1020. Number of enclaves	Medium	python
2390. Removing stars from a string	Medium	python
2336. Smallest number in infinite set	Medium	python
319. Bulb switcher	Medium	python
1491. Average salary excluding the minimum and maximum salary	Easy	golang
1822. Sign of the product of an array	Easy	golang
2215. Find the difference of two arrays	Easy	golang
1456. Maximum number of vowels in a substring of given length	Medium	python
1964. Find the longest valid obstacle course at each position	Hard	golang
1572. Matrix diagonal sum	Easy	python
2130. Maximum twin sum of a linked list	Medium	golang
2542. Maximum subsequence score	Medium	golang
2101. Detonate the maximum bombs	Medium	golang
1376. Time needed to inform all employees	Medium	golang
1232. Check if it is a straight line	Easy	golang
1502. Can make arithmetic progression from sequence	Easy	golang
1318. Minimum flips to make a or b equal to c	Medium	golang
1351. Count negative numbers in a sorted matrix	Easy	golang
137. Single number ii	Medium	golang
1493. Longest subarray of 1s after deleting one element	Medium	golang
209. Minimum size subarray sum	Medium	golang
2024. Maximize the confusion of an exam	Medium	golang
2272. Substring with largest variance	Hard	golang
735. Asteroid collision	Medium	golang
77. Combinations	Medium	golang
215. Kth largest element in an array	Medium	golang
2833. Furthest point from origin	Easy	golang
2828. Check if a string is an acronym of words	Easy	golang
2824. Count pairs whose sum is less than target	Easy	golang
2815. Max pair sum in an array	Easy	golang
2810. Faulty keyboard	Easy	golang
2707. Extra characters in a string	Medium	golang
2839. Check if strings can be made equal with operations i	Easy	golang
92. Reverse linked list ii	Medium	golang
1282. Group the people given the group size they belong to	Medium	golang
135. Candy	Hard	golang
847. Shortest path visiting all nodes	Hard	golang
779. K th symbol in grammar	Medium	golang
2706. Buy two chocolates	Easy	golang
1637. Widest vertical area between two points containing no points	Medium	golang
2610. Convert an array into a 2d array with conditions	Medium	golang
709. To lower case	Easy	golang
717. 1 bit and 2 bit characters	Easy	golang
3019. Number of changing keys	Easy	golang
3005. Count elements with maximum frequency	Easy	golang
2974. Minimum number game	Easy	golang
3014. Minimum number of pushes to type word i	Easy	golang
3010. Divide an array into subarrays with minimum cost i	Easy	golang
2970. Count the number of incremovable subarrays i	Easy	golang
2966. Divide array into arrays with max difference	Medium	golang
3024. Type of triangle ii	Easy	golang
3028. Ant on the boundary	Easy	golang
2960. Count tested devices after test operations	Easy	golang
2997. Minimum number of operations to make array xor equal to k	Medium	golang
3016. Minimum number of pushes to type word ii	Medium	golang
2947. Count beautiful substrings i	Medium	golang
728. Self dividing numbers	Easy	golang
744. Find smallest letter greater than target	Easy	golang
766. Toeplitz matrix	Easy	golang
999. Available captures for rook	Easy	golang
1252. Cells with odd values in a matrix	Easy	golang
1217. Minimum cost to move chips to the same position	Easy	golang
1221. Split a string in balanced strings	Easy	golang
368. Largest divisible subset	Medium	golang
1463. Cherry pickup ii	Hard	golang
1299. Replace elements with greatest element on right side	Easy	golang
1295. Find numbers with even number of digits	Easy	golang
1290. Convert binary number in a linked list to integer	Easy	golang
2108. Find first palindromic string in the array	Easy	golang
43. Multiply strings	Medium	golang
2149. Rearrange array elements by sign	Medium	golang
2971. Find polygon with the largest perimeter	Medium	golang
1481. Least number of unique integers after k removals	Medium	golang
948. Bag of tokens	Medium	golang
1750. Minimum length of string after deleting similar ends	Medium	golang
2540. Minimum common value	Easy	golang
621. Task scheduler	Medium	golang
2958. Length of longest subarray with at most k frequency	Medium	golang
2962. Count subarrays where max element appears at least k times	Medium	golang
678. Valid parenthesis string	Medium	golang
1700. Number of students unable to eat lunch	Easy	golang
2073. Time needed to buy tickets	Easy	golang
950. Reveal cards in increasing order	Medium	golang
402. Remove k digits	Medium	golang
42. Trapping rain water	Hard	golang
988. Smallest string starting from leaf	Medium	golang
2000. Reverse prefix of word	Easy	golang
2441. Largest positive integer that exists with its negative	Easy	golang
165. Compare version numbers	Medium	golang
2807. Insert greatest common divisors in linked list	Medium	golang
2265. Count nodes equal to average of subtree	Medium	golang
1038. Binary search tree to greater sum tree	Medium	golang
2816. Double a number represented as a linked list	Medium	golang
506. Relative ranks	Easy	golang
3075. Maximize happiness of selected children	Medium	golang
786. K th smallest prime fraction	Medium	golang
857. Minimum cost to hire k workers	Hard	golang
2373. Largest local values in a matrix	Easy	golang
861. Score after flipping matrix	Medium	golang
1219. Path with maximum gold	Medium	golang
2733. Neither minimum nor maximum	Easy	golang
2331. Evaluate boolean binary tree	Easy	golang
1325. Delete leaves with a given value	Medium	golang
3068. Find the maximum sum of node values	Hard	golang
1863. Sum of all subset xor totals	Easy	golang
131. Palindrome partitioning	Medium	golang
2597. The number of beautiful subsets	Medium	golang
1255. Maximum score words formed by letters	Hard	golang
1608. Special array with x elements greater than or equal x	Easy	golang
1208. Get equal substrings within budget	Medium	golang
1404. Number of steps to reduce a number in binary representation to one	Medium	golang
1442. Count triplets that can form two arrays of equal xor	Medium	golang
260. Single number iii	Medium	golang
3110. Score of a string	Easy	golang
1002. Find common characters	Easy	golang
846. Hand of straights	Medium	golang
1296. Divide array in sets of k consecutive numbers	Medium	golang
648. Replace words	Medium	golang
330. Patching array	Hard	golang
633. Sum of square numbers	Medium	golang
826. Most profit assigning work	Medium	golang
2037. Minimum number of moves to seat everyone	Easy	golang
1482. Minimum number of days to make m bouquets	Medium	golang
1052. Grumpy bookstore owner	Medium	golang
1438. Longest continuous subarray with absolute diff less than or equal to limit	Medium	golang
995. Minimum number of k consecutive bit flips	Hard	golang
1382. Balance a binary search tree	Medium	golang
2285. Maximum total importance of roads	Medium	golang
1550. Three consecutive odds	Easy	golang
1509. Minimum difference between largest and smallest value in three moves	Medium	golang
2058. Find the minimum and maximum number of nodes between critical points	Medium	golang
2582. Pass the pillow	Easy	golang
1518. Water bottles	Easy	golang
1823. Find the winner of the circular game	Medium	golang
1701. Average waiting time	Medium	golang
1598. Crawler log folder	Easy	golang
1190. Reverse substrings between each pair of parentheses	Medium	golang
1110. Delete nodes and return forest	Medium	golang
1530. Number of good leaf nodes pairs	Medium	golang
2418. Sort the people	Easy	golang
1636. Sort array by increasing frequency	Easy	golang
2191. Sort the jumbled numbers	Medium	golang
2976. Minimum cost to convert string i	Medium	golang
1653. Minimum deletions to make string balanced	Medium	golang
2678. Number of senior citizens	Easy	golang
1460. Make two arrays equal by reversing subarrays	Easy	golang
1508. Range sum of sorted subarray sums	Medium	golang
2053. Kth distinct string in an array	Easy	golang
2396. Strictly palindromic number	Medium	golang
840. Magic squares in grid	Medium	golang
650. 2 keys keyboard	Medium	golang
664. Strange printer	Hard	golang
476. Number complement	Easy	golang
1009. Complement of base 10 integer	Easy	golang
592. Fraction addition and subtraction	Medium	golang
965. Univalued binary tree	Easy	golang
993. Cousins in binary tree	Easy	golang
114. Flatten binary tree to linked list	Medium	golang
590. N ary tree postorder traversal	Easy	golang
1514. Path with maximum probability	Medium	golang
1905. Count sub islands	Medium	golang
748. Shortest completing word	Easy	golang
821. Shortest distance to a character	Easy	golang
725. Split linked list in parts	Medium	golang
1684. Count the number of consistent strings	Easy	golang
731. My calendar ii	Medium	golang
641. Design circular deque	Medium	golang
1381. Design a stack with increment operation	Medium	golang
1497. Check if array pairs are divisible by k	Medium	golang
1331. Rank transform of an array	Easy	golang
1590. Make sum divisible by p	Medium	golang
1813. Sentence similarity iii	Medium	golang
2696. Minimum string length after removing substrings	Easy	golang
1963. Minimum number of swaps to make the string balanced	Medium	golang
921. Minimum add to make parentheses valid	Medium	golang
670. Maximum swap	Medium	golang
3163. String compression iii	Medium	golang
2914. Minimum number of changes to make binary string beautiful	Medium	golang
3011. Find if array can be sorted	Medium	golang
2275. Largest combination with bitwise and greater than zero	Medium	golang
1829. Maximum xor for each query	Medium	golang
3133. Minimum array end	Medium	golang
2064. Minimized maximum of products distributed to any store	Medium	golang
2185. Counting words with a given prefix	Easy	golang
2845. Count of interesting subarrays	Medium	golang
3392. Count subarrays of length three with a condition	Easy	golang
838. Push dominoes	Medium	golang
1007. Minimum domino rotations for equal row	Medium	golang
3335. Total characters in string after transformations i	Medium	golang
3355. Zero array transformation i	Medium	golang
3494. Find the minimum amount of time to brew potions	Medium	golang
3349. Adjacent increasing subarrays detection i	Easy	golang
1018. Binary prefix divisible by 5	Easy	golang
3512. Minimum operations to make array sum divisible by k	Easy	golang
2975. Maximum square area by removing fences from a field	Medium	golang
1895. Largest magic square	Medium	golang
1292. Maximum side length of a square with sum less than or equal to threshold	Medium	golang
3314. Construct the minimum bitwise array i	Easy	golang

adventofcode/2025

Day	Solution
Day 1	golang
Day 2	golang
Day 3	golang
Day 4	golang
Day 5	golang
Day 6	golang

adventofcode/2024

Day	Solution
Day 1	golang
Day 2	golang
Day 3	golang
Day 4	golang
Day 5	golang
Day 6	golang
Day 7	golang
Day 8	golang
Day 9	golang
Day 10	golang
Day 11	golang
Day 12	golang

adventofcode/2022

Day	Solution
Day 1	golang
Day 2	golang
Day 3	golang
Day 4	golang
Day 5	golang
Day 6	golang
Day 7	python3
Day 8	golang
Day 9	python3
Day 10	python3
Day 11	python3
Day 12	golang
Day 13	python3
Day 14	golang
Day 15	python3

codeforces

Problems solved in total: 99

Solutions by difficulty	Solutions by tags

Problem	Difficulty	Solution
112A. Petya and Strings	800	python
158A. Next Round	800	python
231A. Team	800	python
236A. Boy or Girl	800	python
263A. Beautiful Matrix	800	python
266A. Stones on the Table	800	python
281A. Word Capitalization	800	python
282A. Bit++	800	python
339A. Helpful Maths	800	python
4A. Watermelon	800	python
50A. Domino piling	800	python
546A. Soldier and Bananas	800	python
71A. Way Too Long Words	800	python
133A. HQ9+	900	python
160A. Twins	900	python
318A. Even Odds	900	python
580A. Kefa and First Steps	900	python
96A. Football	900	python
118A. String Task	1000	python
122A. Lucky Division	1000	python
1A. Theatre Square	1000	python
58A. Chat room	1000	python
69A. Young Physicist	1000	python
1669A. Division?	800	golang
1660B. Vlad and Candies	800	golang
1674A. Number Transformation	800	golang
1674B. Dictionary	800	golang
1674C. Infinite Replacement	1000	golang
1674D. A-B-C Sort	800	golang
1692A. Marathon	800	golang
1692B. All Distinct	800	golang
1692C. Where's the Bishop?	800	golang
1692D. The Clock	1100	golang
1692F. 3SUM	1300	golang
1714A. Everyone Loves to Sleep	900	golang
1714B. Remove Prefix	800	golang
1714C. Minimum Varied Number	800	golang
1714E. Add Modulo 10	1400	golang
1729A. Two Elevators	800	golang
1729B. Decode String	800	golang
1729C. Jumping on Tiles	1100	golang
1703A. YES or YES?	800	golang
1703B. ICPC Balloons	800	golang
1741A. Compare T-Shirt Sizes	800	golang
1741B. Funny Permutation	800	golang
1741C. Minimize the Thickness	1100	golang
1741D. Masha and a Beautiful Tree	1300	golang
1744A. Number Replacement	800	golang
1744B. Even-Odd Increments	800	golang
1744C. Traffic Light	1000	golang
1744D. Divisibility by 2^n	1200	golang
1741E. Sending a Sequence Over the Network	1600	golang
1749A. Cowardly Rooks	800	golang
1749B. Death's Blessing	900	golang
1747A. Two Groups	800	golang
1747B. BAN BAN	900	golang
1747C. Swap Game	1200	golang
1760A. Medium Number	800	golang
1760B. Atilla's Favorite Problem	800	golang
1760C. Advantage	800	golang
1760D. Challenging Valleys	1000	golang
1760E. Binary Inversions	1100	golang
1760F. Quests	1500	golang
1676A. Lucky?	800	golang
1676B. Equal Candies	800	golang
1676C. Most Similar Words	800	golang
1676D. X-Sum	1000	golang
1760G. SlavicG's Favorite Problem	1700	golang
1690D. Black and White Stripe	1000	golang
1766A. Extremely Round	800	golang
1766B. Notepad#	1000	golang
1766C. Hamiltonian Wall	1300	golang
1772A. A+B?	800	golang
1772B. Matrix Rotation	800	golang
1772C. Different Differences	1000	golang
1772D. Absolute Sorting	1400	golang
1772E. Permutation Game	1700	golang
1791A. Codeforces Checking	800	golang
1791B. Following Directions	800	golang
1791C. Prepend and Append	800	golang
1791D. Distinct Split	1000	golang
1791E. Negatives and Positives	1100	golang
1800A. Is It a Cat?	800	golang
1800B. Count the Number of Pairs	1000	golang
1800C1. Powering the Hero (easy version)	1000	golang
1800C2. Powering the Hero (hard version)	1100	golang
1800D. Remove Two Letters	1200	golang
1800E1. Unforgivable Curse (easy version)	1400	golang
1800E2. Unforgivable Curse (hard version)	1500	golang
1794A. Prefix and Suffix Array	800	golang
1794B. Not Dividing	900	golang
1794C. Scoring Subsequences	1300	golang
1804A. Lame King	800	golang
1804B. Vaccination	1000	golang
1798A. Showstopper	800	golang
1798B. Three Sevens	1000	golang
1798D. Shocking Arrangement	1600	golang
1812A. Are You a Robot?		golang
1812B. Was it Rated?		golang

acm.timus

Problem	Solution	Difficulty	Tags	University course module
1005. Stone Pile	c++	84	problem for beginners	1
1155. Troubleduons	c++	305	none	1
1296. Hyperjump	c++	80	none	1
1401. Gamers	c++	321	none	1
2025. Line Fighting	c++	77	none	1
1207. Median on the Plane	c++	177	geometry	2
1322. Spy	c++	324	none	2
1444. Elephpotamus	c++	639	geometry	2
1604. Country of Fools	c++	220	none	2
1726. Visits	c++	197	none	2
1067. Disk Tree	c++	486	data structures	3
1494. Monobilliards	c++	131	data structures	3
1521. War Games 2	c++	192	data structures	3
1628. White Streaks	c++	293	data structures	3
1650. Billionaires	c++	339	data structures	3
1080. Map Coloring	c++	229	graph theory	4
1160. Network	c++	226	graph theory	4
1162. Currency Exchange	c++	342	graph theory	4
1450. Russian Pipelines	c++	225	graph theory	4
1806. Mobile Telegraphs	c++	402	graph theory	4