# 09.11.2025
[2169. Count Operations to Obtain Zero](https://leetcode.com/problems/count-operations-to-obtain-zero/description/) easy

Count numbers subtractions until 0 #easy

# 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

# 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

# 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

# 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

# 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

# 07.12.2025
[1523. Count Odd Numbers in an Interval Range](https://leetcode.com/problems/count-odd-numbers-in-an-interval-range/description/) easy


Odds l..h #easy

# 08.12.2025
[1925. Count Square Sum Triples](https://leetcode.com/problems/count-square-sum-triples/description/) easy


Count a^2+b^2=c^2 in 1..n range #easy