Daily (114 day streak)
Hard, and it is hard, especially to build an intuition. But in the comments I will leave the hints that helped me to build mental model
https://leetcode.com/problems/maximum-running-time-of-n-computers/description/?envType=daily-question&envId=2025-12-01
#daily #hard
Hard, and it is hard, especially to build an intuition. But in the comments I will leave the hints that helped me to build mental model
https://leetcode.com/problems/maximum-running-time-of-n-computers/description/?envType=daily-question&envId=2025-12-01
#daily #hard
🔥1
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
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
👍1
After 1 month of procrastinating and writing in background, it is eventually out. I guess this is the most detailed article about Stripe System Design.
Please leave your thoughts about the decisions made in the design and overall about the article.
https://andreyka26.com/payment-gateway-stripe-system-design-with-microsoft-engineer
Please leave your thoughts about the decisions made in the design and overall about the article.
https://andreyka26.com/payment-gateway-stripe-system-design-with-microsoft-engineer
andreyka26 tech
Payment Gateway (Stripe) System Design with Microsoft Engineer
I am Software Engineer at Microsoft. This is my tech blog where I would like to share my findings, guides and docs. Feel free to contact me.
❤8🔥1
For technical articles I think that will be it. We are starting soon writing about leaving Microsoft, about relocation to Ireland, about Snowflake, etc.
You gonna have the link the first ofc
You gonna have the link the first ofc
❤4👍2
Daily (116 day streak)
One of the rare cases, where problem is hard, I didin't solve it on my own, but I really liked it. Hints, geometry and intuition are in the comment section
https://leetcode.com/problems/count-number-of-trapezoids-ii/description/?envType=daily-question&envId=2025-12-03
#daily #hard
One of the rare cases, where problem is hard, I didin't solve it on my own, but I really liked it. Hints, geometry and intuition are in the comment section
https://leetcode.com/problems/count-number-of-trapezoids-ii/description/?envType=daily-question&envId=2025-12-03
#daily #hard
andreyka26_se
Daily (116 day streak) One of the rare cases, where problem is hard, I didin't solve it on my own, but I really liked it. Hints, geometry and intuition are in the comment section https://leetcode.com/problems/count-number-of-trapezoids-ii/description/?envType=daily…
As we seen, some math background is needed for the leetcode question above, which was many times asked in Google. So, let's add it as separate posts
How to check that lines are parallel?
1. Calculate vectors out of coordinates
dx = x2 - x1, dy = y2 - y1 => vector = (dx, dy)
2. Calcualte a slope = dy / dx.
3. any two lines that have the same slope (dy/dx) are parallel
#math
1. Calculate vectors out of coordinates
dx = x2 - x1, dy = y2 - y1 => vector = (dx, dy)
2. Calcualte a slope = dy / dx.
3. any two lines that have the same slope (dy/dx) are parallel
#math
👍4
How to check that two vectors are collinear (share the same line)
The idea behind is to calculate where both vector would intercept Y axis.
We can do it using line formula
#math
The idea behind is to calculate where both vector would intercept Y axis.
We can do it using line formula
y = kx + b. For every single point in all vectors we know x, y, k = dy / dx. From these values we can find b#math
1👍3
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
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
👍2