# 5.07.2025
[1394. Find Lucky Integer in an Array](https://leetcode.com/problems/find-lucky-integer-in-an-array/description)
Max x == freq(x) #easy
[1394. Find Lucky Integer in an Array](https://leetcode.com/problems/find-lucky-integer-in-an-array/description)
Max x == freq(x) #easy
👍2
# 6.07.2025
[1865. Finding Pairs With a Certain Sum](https://leetcode.com/problems/finding-pairs-with-a-certain-sum/description/) medium
Design pairs counter; two lists, one changes #medium #hashmap
[1865. Finding Pairs With a Certain Sum](https://leetcode.com/problems/finding-pairs-with-a-certain-sum/description/) medium
Design pairs counter; two lists, one changes #medium #hashmap
👍2
# 7.07.2025
[1353. Maximum Number of Events That Can Be Attended](https://leetcode.com/problems/maximum-number-of-events-that-can-be-attended/description/) medium
Max attended events #medium #heap
[1353. Maximum Number of Events That Can Be Attended](https://leetcode.com/problems/maximum-number-of-events-that-can-be-attended/description/) medium
Max attended events #medium #heap
👍2
# 8.07.2025
[1751. Maximum Number of Events That Can Be Attended II](https://leetcode.com/problems/maximum-number-of-events-that-can-be-attended-ii/description) hard
Max top k valued intervals #hard #binary_search #dp
[1751. Maximum Number of Events That Can Be Attended II](https://leetcode.com/problems/maximum-number-of-events-that-can-be-attended-ii/description) hard
Max top k valued intervals #hard #binary_search #dp
👍2
# 9.07.2025
[3439. Reschedule Meetings for Maximum Free Time I](https://leetcode.com/problems/reschedule-meetings-for-maximum-free-time-i/description) medium
Max free time after moving k events together #medium #sliding_window
[3439. Reschedule Meetings for Maximum Free Time I](https://leetcode.com/problems/reschedule-meetings-for-maximum-free-time-i/description) medium
Max free time after moving k events together #medium #sliding_window
👍2
# 10.07.2025
[3440. Reschedule Meetings for Maximum Free Time II](https://leetcode.com/problems/reschedule-meetings-for-maximum-free-time-ii/description/) medium
Max free time after moving 1 event #medium #sorting
[3440. Reschedule Meetings for Maximum Free Time II](https://leetcode.com/problems/reschedule-meetings-for-maximum-free-time-ii/description/) medium
Max free time after moving 1 event #medium #sorting
👍2
# 11.07.2025
[2402. Meeting Rooms III](https://leetcode.com/problems/meeting-rooms-iii/description) hard
Most frequent meeting room #hard #heap
[2402. Meeting Rooms III](https://leetcode.com/problems/meeting-rooms-iii/description) hard
Most frequent meeting room #hard #heap
👍3
# 12.07.2025
[1900. The Earliest and Latest Rounds Where Players Compete](https://leetcode.com/problems/the-earliest-and-latest-rounds-where-players-compete/description) hard
First and last round Alice fight Bob #hard #simulation
[1900. The Earliest and Latest Rounds Where Players Compete](https://leetcode.com/problems/the-earliest-and-latest-rounds-where-players-compete/description) hard
First and last round Alice fight Bob #hard #simulation
👍2
# 13.07.2025
[2410. Maximum Matching of Players With Trainers](https://leetcode.com/problems/maximum-matching-of-players-with-trainers/description/) medium
Count trainers for players #medium #sort
[2410. Maximum Matching of Players With Trainers](https://leetcode.com/problems/maximum-matching-of-players-with-trainers/description/) medium
Count trainers for players #medium #sort
👍2
# 14.07.2025
[1290. Convert Binary Number in a Linked List to Integer](https://leetcode.com/problems/convert-binary-number-in-a-linked-list-to-integer/description/) easy
Binary linked list to decimal #easy #linkedlist
[1290. Convert Binary Number in a Linked List to Integer](https://leetcode.com/problems/convert-binary-number-in-a-linked-list-to-integer/description/) easy
Binary linked list to decimal #easy #linkedlist
👍2
# 15.07.2025
[3136. Valid Word](https://leetcode.com/problems/valid-word/description/) easy
Check set of rules #easy
[3136. Valid Word](https://leetcode.com/problems/valid-word/description/) easy
Check set of rules #easy
👍2
# 16.07.2025
[3201. Find the Maximum Length of Valid Subsequence I](https://leetcode.com/problems/find-the-maximum-length-of-valid-subsequence-i/description/) medium
Longest same-pair-parity subsequence #medium #greedy
[3201. Find the Maximum Length of Valid Subsequence I](https://leetcode.com/problems/find-the-maximum-length-of-valid-subsequence-i/description/) medium
Longest same-pair-parity subsequence #medium #greedy
👍2
# 17.07.2025
[3202. Find the Maximum Length of Valid Subsequence II](https://leetcode.com/problems/find-the-maximum-length-of-valid-subsequence-ii/description) medium
Longest same-pair-k-parity subsequence #medium #dp
[3202. Find the Maximum Length of Valid Subsequence II](https://leetcode.com/problems/find-the-maximum-length-of-valid-subsequence-ii/description) medium
Longest same-pair-k-parity subsequence #medium #dp
👍2
# 18.07.2025
[2163. Minimum Difference in Sums After Removal of Elements](https://leetcode.com/problems/minimum-difference-in-sums-after-removal-of-elements/description/) hard
Min first half - second half after removing n/3 #hard #heap
[2163. Minimum Difference in Sums After Removal of Elements](https://leetcode.com/problems/minimum-difference-in-sums-after-removal-of-elements/description/) hard
Min first half - second half after removing n/3 #hard #heap
👍2❤1
# 19.07.2025
[1233. Remove Sub-Folders from the Filesystem](https://leetcode.com/problems/remove-sub-folders-from-the-filesystem/description) hard
Fold folders #medium
[1233. Remove Sub-Folders from the Filesystem](https://leetcode.com/problems/remove-sub-folders-from-the-filesystem/description) hard
Fold folders #medium
👍2
# 20.07.2025
[1948. Delete Duplicate Folders in System](https://leetcode.com/problems/delete-duplicate-folders-in-system/description/) hard
Remove duplicate folder trees #hard #trie
[1948. Delete Duplicate Folders in System](https://leetcode.com/problems/delete-duplicate-folders-in-system/description/) hard
Remove duplicate folder trees #hard #trie
👍1
# 21.07.2025
[1957. Delete Characters to Make Fancy String](https://leetcode.com/problems/delete-characters-to-make-fancy-string/description) easy
No three chars repeats #easy
[1957. Delete Characters to Make Fancy String](https://leetcode.com/problems/delete-characters-to-make-fancy-string/description) easy
No three chars repeats #easy
👍1
# 22.07.2025
[1695. Maximum Erasure Value](https://leetcode.com/problems/maximum-erasure-value/description/) medium
Max unique subarray sum #medium #sliding_window
[1695. Maximum Erasure Value](https://leetcode.com/problems/maximum-erasure-value/description/) medium
Max unique subarray sum #medium #sliding_window
👍1
# 23.07.2025
[1717. Maximum Score From Removing Substrings](https://leetcode.com/problems/maximum-score-from-removing-substrings/description/) medium
Max removals ab=x, ba=y #medium #stack
[1717. Maximum Score From Removing Substrings](https://leetcode.com/problems/maximum-score-from-removing-substrings/description/) medium
Max removals ab=x, ba=y #medium #stack
👍1
# 24.07.2025
[2322. Minimum Score After Removals on a Tree](https://leetcode.com/problems/minimum-score-after-removals-on-a-tree/description) hard
Min(max_group_xor - min_group_xor) by removing 2 edges from tree #hard #uf
[2322. Minimum Score After Removals on a Tree](https://leetcode.com/problems/minimum-score-after-removals-on-a-tree/description) hard
Min(max_group_xor - min_group_xor) by removing 2 edges from tree #hard #uf
👍1