https://leetcode.com/problems/find-numbers-with-even-number-of-digits/description/


Even length numbers #easy

Dominoes pairs #easy #hash

https://leetcode.com/problems/number-of-equivalent-domino-pairs/description/

n[n[i]] #easy


https://leetcode.com/problems/build-array-from-permutation/description/

3 odds #easy #bitmask


https://leetcode.com/problems/three-consecutive-odds/description/

Triple digit even numbers from digits #easy #backtrack


https://leetcode.com/problems/finding-3-digit-even-numbers/description

https://leetcode.com/problems/longest-unequal-adjacent-groups-subsequence-i/description


Longest subsequence alterating g #easy #gready

https://leetcode.com/problems/type-of-triangle/description/

Triangle type by lengths #easy

Indices with x #easy


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

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


Sum non-divisible minus sum divisible #easy #math

# 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

# 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

# 14.06.2025
[2566. Maximum Difference by Remapping a Digit](https://leetcode.com/problems/maximum-difference-by-remapping-a-digit/description/) easy


Max - min, replacing any digit #easy

# 16.06.2025
[2016. Maximum Difference Between Increasing Elements](https://leetcode.com/problems/maximum-difference-between-increasing-elements/description) easy


Max increasing pair diff #easy

# 22.06.2025
[2138. Divide a String Into Groups of Size k](https://leetcode.com/problems/divide-a-string-into-groups-of-size-k/description/) easy


k-chunked string, filled tail #easy

# 24.06.2025
[2200. Find All K-Distant Indices in an Array](https://leetcode.com/problems/find-all-k-distant-indices-in-an-array/description/) easy


Indices k-distant to key #easy

# 28.06.2025
[2099. Find Subsequence of Length K With the Largest Sum](https://leetcode.com/problems/find-subsequence-of-length-k-with-the-largest-sum/description/) easy

Subsequence of k largest #easy #sort

# 30.06.2025
[594. Longest Harmonious Subsequence](https://leetcode.com/problems/longest-harmonious-subsequence/description) easy


Longest subsequence with max-min=1 #easy #counting #sort #two_pointers

# 1.07.2025
[3330. Find the Original Typed String I](https://leetcode.com/problems/find-the-original-typed-string-i/description/) easy


ways to remove duplicates #easy #counting

# 3.07.2025
[3304. Find the K-th Character in String Game I](https://leetcode.com/problems/find-the-k-th-character-in-string-game-i/description/) easy


`k`th char after appending rotated self #easy

# 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