# 05.10.2025
[3539. Find Sum of Array Product of Magical Sequences](https://leetcode.com/problems/find-sum-of-array-product-of-magical-sequences/description/) medium


Product of all good subsequences and permutations #hard #combinatorics

# 13.10.2025
[2273. Find Resultant Array After Removing Anagrams](https://leetcode.com/problems/find-resultant-array-after-removing-anagrams/description) medium

Dedup anagrams #easy

# 14.10.2025
[3349. Adjacent Increasing Subarrays Detection I](https://leetcode.com/problems/adjacent-increasing-subarrays-detection-i/description) medium

Any increasing consequent windows size k #easy

# 15.10.2025
[3350. Adjacent Increasing Subarrays Detection II](https://leetcode.com/problems/adjacent-increasing-subarrays-detection-ii/description/) medium

Max k of adjucent increasing k-windows #medium #counting

# 16.10.2025
[2598. Smallest Missing Non-negative Integer After Operations](https://leetcode.com/problems/smallest-missing-non-negative-integer-after-operations/description/) medium


First positive number can't be build by adding/subtracting value #medium #hashmap

# 05.10.2025
[3003. Maximize the Number of Partitions After Operations](https://leetcode.com/problems/maximize-the-number-of-partitions-after-operations/) medium

Max k-uniq parts after changing one letter #hard #prefix

# 18.10.2025
[3397. Maximum Number of Distinct Elements After Operations](https://leetcode.com/problems/maximum-number-of-distinct-elements-after-operations/description) medium

Distincts count after adding -k..k to each #medium

# 19.10.2025
[1625. Lexicographically Smallest String After Applying Operations](https://leetcode.com/problems/lexicographically-smallest-string-after-applying-operations/description) medium

Min string after shifting by b and rotating odd indice by a #medium #bruteforce

# 20.10.2025
[2011. Final Value of Variable After Performing Operations](https://leetcode.com/problems/final-value-of-variable-after-performing-operations/description) easy

do ++ or -- operation from 0 #easy

# 21.10.2025
[3346. Maximum Frequency of an Element After Performing Operations I](https://leetcode.com/problems/maximum-frequency-of-an-element-after-performing-operations-i/description) medium

Max frequency after changing +k..-k ops elements #medium #sliding_window

# 22.10.2025
[3347. Maximum Frequency of an Element After Performing Operations II](https://leetcode.com/problems/maximum-frequency-of-an-element-after-performing-operations-ii/description) hard

Max frequency after changing +k..-k ops elements #medium #sliding_window

# 23.10.2025
[3461. Check If Digits Are Equal in String After Operations I](https://leetcode.com/problems/check-if-digits-are-equal-in-string-after-operations-i/description/) easy


Fold each pair to (a+b)%10 until 2 left #easy