https://leetcode.com/problems/find-the-maximum-sum-of-node-values/description/

Max sum by k-xoring edges #hard #tree #dp

Indices with x #easy


https://leetcode.com/problems/find-words-containing-character/description/

https://leetcode.com/problems/longest-palindrome-by-concatenating-two-letter-words/description/


2131. Longest Palindrome by Concatenating Two Letter Words

https://leetcode.com/problems/largest-color-value-in-a-directed-graph/description/


Max color freq path #hard #dp #toposort

https://leetcode.com/problems/divisible-and-non-divisible-sums-difference/description/


Sum non-divisible minus sum divisible #easy #math

https://leetcode.com/problems/maximize-the-number-of-target-nodes-after-connecting-trees-i/description/

Max k-reacheable nodes of merged trees #medium #dfs

Max even-edged siblings after merging trees #hard #graph


https://leetcode.com/problems/maximize-the-number-of-target-nodes-after-connecting-trees-ii/description

https://leetcode.com/problems/find-closest-node-to-given-two-nodes/description


Closest common node #medium #bfs

https://leetcode.com/problems/snakes-and-ladders/description/


Shortest path bottom-top in zig-zag matrix with jumps #medium #bfs

https://leetcode.com/problems/distribute-candies-among-children-ii/description/


Ways to give limited from n candies to 3 kids #medium #math #combinations

https://leetcode.com/problems/candy/description/

Min candies, fair siblings by ratings #hard #greedy

https://leetcode.com/problems/maximum-candies-you-can-get-from-boxes/description


Open boxes graph with keys simulation #hard

https://leetcode.com/problems/find-the-lexicographically-largest-string-from-the-box-i/description


Max string of every split by n #medium

https://leetcode.com/problems/lexicographically-smallest-equivalent-string/description/


Map by smallest in group from associate s1 with s2 #medium

https://leetcode.com/problems/using-a-robot-to-print-the-lexicographically-smallest-string/description/


Smallest string by writing to stack #medium #string

https://leetcode.com/problems/lexicographically-minimum-string-after-removing-stars/description


Smallest string by remove min to the left of * #medium

# 08.06.2025
[386. Lexicographical Numbers](https://leetcode.com/problems/lexicographical-numbers/description/) medium


Generate lexicographical numbers 1..n #medium

# 09.06.2025
[440. K-th Smallest in Lexicographical Order](https://leetcode.com/problems/k-th-smallest-in-lexicographical-order/description/) hard

k-th lexicographical number of 1..n #hard

# 10.06.2025
[3442. Maximum Difference Between Even and Odd Frequency I](https://leetcode.com/problems/maximum-difference-between-even-and-odd-frequency-i/description/) easy

Max odd - min even frequency #easy

# 11.06.2025
[3445. Maximum Difference Between Even and Odd Frequency II](https://leetcode.com/problems/maximum-difference-between-even-and-odd-frequency-ii/description) hard

Max odd - min even frequency, window at least k #hard

# 12.06.2025
[3423. Maximum Difference Between Adjacent Elements in a Circular Array](https://leetcode.com/problems/maximum-difference-between-adjacent-elements-in-a-circular-array/description/) easy


Max abs sibling diff #easy