Substrings with [abc] #medium #two_pointers



https://leetcode.com/problems/number-of-substrings-containing-all-three-characters/description/

Max window of all pairs AND zero #medium #two_pointers #bit_manipulation


https://leetcode.com/problems/longest-nice-subarray/description/

https://leetcode.com/problems/count-the-number-of-fair-pairs/description/

Pairs a + b in lower..upper #medium #two_pointers

https://leetcode.com/problems/count-complete-subarrays-in-an-array/description/


Subarrays having all uniqs #medium #two_pointers

https://leetcode.com/problems/count-subarrays-with-fixed-bounds/description


Subarrays with min=minK, max=maxK #hard #two_pointers

https://leetcode.com/problems/count-subarrays-with-score-less-than-k/description/

Subarrays sum * cnt <= k #hard #two_pointers

Subarrays at least k maxes #medium #two_pointers


https://leetcode.com/problems/count-subarrays-where-max-element-appears-at-least-k-times/description

https://leetcode.com/problems/sort-colors/description


Sort 0,1,2 array #medium #two_pointers

# 29.06.2025
[1498. Number of Subsequences That Satisfy the Given Sum Condition](https://leetcode.com/problems/number-of-subsequences-that-satisfy-the-given-sum-condition/description/) medium


Subsequencies target in 0..min+max #medium #binary_search #two_pointers

# 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