Daily

Not hard, not bad, greedy problem.

https://leetcode.com/problems/maximum-number-of-operations-to-move-ones-to-the-end/description/?envType=daily-question&envId=2025-11-13

#daily #medium

Daily

Actually a nice one. Kind of "area" line sweep. Nice to learn a bit.

The hint: the intuition you can derive from is try to do it with 1D array and columns updates on it.

https://leetcode.com/problems/increment-submatrices-by-one/description/?envType=daily-question&envId=2025-11-14

#daily #medium

Daily

As I told you before, daily is piece of shit. No way this is medium. But yeah.

https://leetcode.com/problems/count-the-number-of-substrings-with-dominant-ones/description/?envType=daily-question&envId=2025-11-15

#daily #medium

Daily

Nice problem, pretty easy. But you need to recall how to do arithmetic progression: https://en.wikipedia.org/wiki/Arithmetic_progression

#daily #medium

Daily

Nice problem, even though I didn't figure out the intuition right from the first time.

https://leetcode.com/problems/unique-length-3-palindromic-subsequences/description/?envType=daily-question&envId=2025-11-21


#daily #medium

Daily

Pretty hard DP to me, but solvable with hints

https://leetcode.com/problems/greatest-sum-divisible-by-three/?envType=daily-question&envId=2025-11-23

#daily #medium

Daily

A bit of math bullshit, does not recommend, but with hints and simple run in the head it is not that hard.

https://leetcode.com/problems/smallest-integer-divisible-by-k/description/?envType=daily-question&envId=2025-11-25

#daily #medium

Daily (110 day streak)

I would not say that intuition is that easy to build, but once you've done it - it is fairly easy. For that you would need to know Kadane's algo, which is a good problem to remind about it

https://leetcode.com/problems/maximum-subarray-sum-with-length-divisible-by-k/description/?envType=daily-question&envId=2025-11-27

#daily #medium

Daily (113 day streak)

Actually I would say intuition here to build is pretty hard. But once you have it solution is not that cumbersome or hard

https://leetcode.com/problems/make-sum-divisible-by-p/description/?envType=daily-question&envId=2025-11-30

#daily #medium

Daily (115 day streak)

Nice problem. I found out that I really like when leetcode problem has something physical or semi physical. Today it is geometry and trapezoids. However some simple math is used here.


https://leetcode.com/problems/count-number-of-trapezoids-i/description/?envType=daily-question&envId=2025-12-02


#daily #medium

Daily (117 day streak)

Interesting problem, I wouldn't say it is hard, simulation will work, the trick here to write a good simulation, or figure out smart algo

https://leetcode.com/problems/count-collisions-on-a-road/description/?envType=daily-question&envId=2025-12-04

#daily #medium