# 16.11.2025
[1513. Number of Substrings With Only 1s](https://leetcode.com/problems/number-of-substrings-with-only-1s/description/) medium

Substrings of ones #medium #counting

# 17.11.2025
[1437. Check If All 1's Are at Least Length K Places Away](https://leetcode.com/problems/check-if-all-1s-are-at-least-length-k-places-away/description) easy

All ones k-distant #easy

# 18.11.2025
[717. 1-bit and 2-bit Characters](https://leetcode.com/problems/1-bit-and-2-bit-characters/description/) easy

Is '0' last from characters '0','10','11' concatenation #easy

# 19.11.2025
[2154. Keep Multiplying Found Values by Two](https://leetcode.com/problems/keep-multiplying-found-values-by-two/description/) easy

First original=original*2 not in array #easy

# 20.11.2025
[757. Set Intersection Size At Least Two](https://leetcode.com/problems/set-intersection-size-at-least-two/description) hard

Min set each interval have two values in it #hard #sorting

# 21.11.2025
[1930. Unique Length-3 Palindromic Subsequences](https://leetcode.com/problems/unique-length-3-palindromic-subsequences/description/) medium

3-palindroms subsequences #medium

# 22.11.2025
[3190. Find Minimum Operations to Make All Elements Divisible by Three](https://leetcode.com/problems/find-minimum-operations-to-make-all-elements-divisible-by-three) easy

Min steps inc/dec to make %3 #easy

# 23.10.2025
[1262. Greatest Sum Divisible by Three](https://leetcode.com/problems/greatest-sum-divisible-by-three/description/) medium

Max sum that %3 #medium

# 24.11.2025
[1018. Binary Prefix Divisible By 5](https://leetcode.com/problems/binary-prefix-divisible-by-5/description/) easy

Prefixes divisible by 5 #easy #brainteaser

# 25.11.2025
[1015. Smallest Integer Divisible by K](https://leetcode.com/problems/smallest-integer-divisible-by-k/description) medium

Smallest number 11..1 % k #medium

# 26.11.2025
[2435. Paths in Matrix Whose Sum Is Divisible by K](https://leetcode.com/problems/paths-in-matrix-whose-sum-is-divisible-by-k/description/) hard

Paths in 2D matrix %k #hard

# 27.11.2025
[3381. Maximum Subarray Sum With Length Divisible by K](https://leetcode.com/problems/maximum-subarray-sum-with-length-divisible-by-k/description/) medium

Max sum of %k-length subarray #medium

# 28.11.2025
[2872. Maximum Number of K-Divisible Components](https://leetcode.com/problems/maximum-number-of-k-divisible-components/description/) hard

Max cuts where every subtree sum %k #hard #dfs

# 29.11.2025
[3512. Minimum Operations to Make Array Sum Divisible by K](https://leetcode.com/problems/minimum-operations-to-make-array-sum-divisible-by-k/description/) easy

Sum % k #easy

# 30.11.2025
[1590. Make Sum Divisible by P](https://leetcode.com/problems/make-sum-divisible-by-p/description/) medium

Min removal to make sum%p #medium #hashmap

# 01.12.2025
[2141. Maximum Running Time of N Computers](https://leetcode.com/problems/maximum-running-time-of-n-computers/description) hard

Max time to run n computers with batteries #hard #bs

# 02.12.2025
[3623. Count Number of Trapezoids I](https://leetcode.com/problems/count-number-of-trapezoids-i/description) medium

Trapezoids count #medium

# 03.12.2025
[3625. Count Number of Trapezoids II](https://leetcode.com/problems/count-number-of-trapezoids-ii) hard

Count trapezoids from points #hard #geometry

# 04.12.2025
[2211. Count Collisions on a Road](https://leetcode.com/problems/count-collisions-on-a-road/description/) medium

Collisions R vs L #medium

# 05.12.2025
[3432. Count Partitions with Even Sum Difference](https://leetcode.com/problems/count-partitions-with-even-sum-difference/description/) easy

Count Left sum - Right sum % 2 #easy