Daily (256/373 streak until LC cap)
I'm sorry for late notice, but this is amazing problem. Can be solved via bruteforce, but also has amazing pattern that I had during one of my real big tech interviews. Recommended definitely
https://leetcode.com/problems/words-within-two-edits-of-dictionary/description/?envType=daily-question&envId=2026-04-22
#daily #medium #recommend #pattern
I'm sorry for late notice, but this is amazing problem. Can be solved via bruteforce, but also has amazing pattern that I had during one of my real big tech interviews. Recommended definitely
https://leetcode.com/problems/words-within-two-edits-of-dictionary/description/?envType=daily-question&envId=2026-04-22
#daily #medium #recommend #pattern
👍4
Daily (257/373 streak until LC cap)
Pretty solid question for prefix sum, however the intuition is not that easy.
https://leetcode.com/problems/sum-of-distances/description/?envType=daily-question&envId=2026-04-23
#daily #medium #pattern
Pretty solid question for prefix sum, however the intuition is not that easy.
https://leetcode.com/problems/sum-of-distances/description/?envType=daily-question&envId=2026-04-23
#daily #medium #pattern
🔥4
So, question from real prod investigation.
You are high load system, and you are checking metrics of where server sends requests to.
You see 99% of destination ports reported by some low level tool (bpf) equal to 47873.
Apparently this is not usual port, as most of the IPs are leading to cloud providers, eg azure, aws, etc.
What is the actual port?
Hint: small/big endian.
(Posting real answer with explanation in the evening)
You are high load system, and you are checking metrics of where server sends requests to.
You see 99% of destination ports reported by some low level tool (bpf) equal to 47873.
Apparently this is not usual port, as most of the IPs are leading to cloud providers, eg azure, aws, etc.
What is the actual port?
Hint: small/big endian.
(Posting real answer with explanation in the evening)
🔥6
❤3
Daily (258/373 streak until LC cap)
Regular easy problem, practicing more intuition building than any pattern
https://leetcode.com/problems/furthest-point-from-origin/?envType=daily-question&envId=2026-04-25
#daily #easy
Regular easy problem, practicing more intuition building than any pattern
https://leetcode.com/problems/furthest-point-from-origin/?envType=daily-question&envId=2026-04-25
#daily #easy
❤2
andreyka26_se
So, question from real prod investigation. You are high load system, and you are checking metrics of where server sends requests to. You see 99% of destination ports reported by some low level tool (bpf) equal to 47873. Apparently this is not usual port…
The correct answer is 443.
Now explanation. On the low level (BPF) you might have two different bytes order (not bits order though) for number that include ips and ports: big-endian and small-endian. The problem was that some tool assumed wrong endian for port and did reversing of the bytes, however the underlying library was already giving the port in the correct number
Now explanation. On the low level (BPF) you might have two different bytes order (not bits order though) for number that include ips and ports: big-endian and small-endian. The problem was that some tool assumed wrong endian for port and did reversing of the bytes, however the underlying library was already giving the port in the correct number
👍5
Daily (259/373 streak until LC cap)
I mean whenever I see "maximum possible minimum" and hard badge, it is skip, I"m sorry. Took me too much to even understand the problem statement, and today was socializing day I don't even have energy to solve hard nonsense right now.
https://leetcode.com/problems/maximize-the-distance-between-points-on-a-square/description/?envType=daily-question&envId=2026-04-25
#daily #hard
I mean whenever I see "maximum possible minimum" and hard badge, it is skip, I"m sorry. Took me too much to even understand the problem statement, and today was socializing day I don't even have energy to solve hard nonsense right now.
https://leetcode.com/problems/maximize-the-distance-between-points-on-a-square/description/?envType=daily-question&envId=2026-04-25
#daily #hard
❤6
Daily (260/373 streak until LC cap)
Amazing problem, really recommended, it if first of all not bullshit, it has well known pattern, well known algo in computer science, I personally was asked to implement similar in one of my interviews to big tech
https://leetcode.com/problems/detect-cycles-in-2d-grid/description/?envType=daily-question&envId=2026-04-26
#daily #medium #pattern #recommend
Amazing problem, really recommended, it if first of all not bullshit, it has well known pattern, well known algo in computer science, I personally was asked to implement similar in one of my interviews to big tech
https://leetcode.com/problems/detect-cycles-in-2d-grid/description/?envType=daily-question&envId=2026-04-26
#daily #medium #pattern #recommend
LeetCode
Detect Cycles in 2D Grid - LeetCode
Can you solve this real interview question? Detect Cycles in 2D Grid - Given a 2D array of characters grid of size m x n, you need to find if there exists any cycle consisting of the same value in grid.
A cycle is a path of length 4 or more in the grid that…
A cycle is a path of length 4 or more in the grid that…
👍4
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This guy’s really fighting with it😁
😁4❤2
Daily (261/373 streak until LC cap)
Amazing graph problem. Definitely recommended, it is not that frequent to have a good problem on daily (I have put thumb up)
https://leetcode.com/problems/check-if-there-is-a-valid-path-in-a-grid/description/?envType=daily-question&envId=2026-04-27
#daily #medium #pattern #recommend
Amazing graph problem. Definitely recommended, it is not that frequent to have a good problem on daily (I have put thumb up)
https://leetcode.com/problems/check-if-there-is-a-valid-path-in-a-grid/description/?envType=daily-question&envId=2026-04-27
#daily #medium #pattern #recommend
❤3👍2
Daily (262/373 streak until LC cap)
Funny, I has solved this problem 26th of March last year.
Not bad daily, however I don't see any pattern except some simple math and intuition.
https://leetcode.com/problems/minimum-operations-to-make-a-uni-value-grid/submissions/?envType=daily-question&envId=2026-04-28
#daily #medium #nopattern
Funny, I has solved this problem 26th of March last year.
Not bad daily, however I don't see any pattern except some simple math and intuition.
https://leetcode.com/problems/minimum-operations-to-make-a-uni-value-grid/submissions/?envType=daily-question&envId=2026-04-28
#daily #medium #nopattern
👍3
I have decided. Next article is going to be Uber system design or Load balancers / proxies deep dive.
Dont worry, I am not switched to leetcode posting only, jut having hard time at snowflake at the moment.
Dont worry, I am not switched to leetcode posting only, jut having hard time at snowflake at the moment.
👍15🔥3❤1
Daily (264/373 streak until LC cap)
Nice reminder for Dynamic Programming, not hard to be honest.
https://leetcode.com/problems/maximum-path-score-in-a-grid/description/?envType=daily-question&envId=2026-04-30
btw, yesterday's daily was a bit bullshit and hard, so skipping.
#daily #medium #pattern
Nice reminder for Dynamic Programming, not hard to be honest.
https://leetcode.com/problems/maximum-path-score-in-a-grid/description/?envType=daily-question&envId=2026-04-30
btw, yesterday's daily was a bit bullshit and hard, so skipping.
#daily #medium #pattern
❤4