andreyka26_se
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Hey, I'm software engineer at Microsoft, with 7 years of experience. Here we are talking about F(M)AANG big tech interviews: leetcode, system design and corpo life.

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Daily

Today is graph problem. I love graph problems. But it requires again a bit of coding, and a bit of graph algo's knowledge.

https://leetcode.com/problems/power-grid-maintenance/description/?envType=daily-question&envId=2025-11-06

#daily #medium
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Some motherfuckers raided the server.....

o my god, if you are reading this - prepare your moms, we are coming
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I didn't think this is still a thing + I don't think it was directed.
How then they do it, do they scan all possible IPS and then run some script if it is unprotected?

hmmmm
I'm wondering, can they "save" backup of minecraft world just having access to the server? Does this minecraft thing allows it?

I thought you need directly go to server and play with volumes
Who remembers this legend???
once a year, for one week it plays while I'm working
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Daily

Pretty hard IMO, didn't like question much, however I would not say it is bullshit, it is quite good, just that hard for me.

https://leetcode.com/problems/maximize-the-minimum-powered-city/?envType=daily-question&envId=2025-11-07

#daily #hard
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Daily

nono, fuck it, when the problem needs some fucking "Gray Code" knowledge, this is bye bye. Bullshit question, don't waste time.

https://leetcode.com/problems/minimum-one-bit-operations-to-make-integers-zero/solutions/7333658/bit-manipulation-gray-code-logic-python-kwkii/?envType=daily-question&envId=2025-11-08

#dailly #hard
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Right now I'm learning a bit of domain knowledge about how Payment Gateways like Stripe work to not fuckup when I publish System Design Solution here. SO:
When customer submits card details to Stripe willing to pay merchant for his goods, what Stripe does FIRST to capture money from the customer?
(first should be authorization transaction)
Anonymous Poll
47%
contacts customer's (issuing) bank, that issued card
35%
contacts Card Network
6%
contacts Stripe's bank (receiving)
12%
contacts Merchant's (Goods/Services owner) bank
Terminology:
Stripe - payment gateway
Merchant - the guy selling goods or services
Customer - the guy buying goods or services from Merchant

Issuing / customer's bank - the bank that issued card to customer, that he pays with
Merchant's bank - the bank where merchant receives money when customer pays for it
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Don't worry, by the end of the day the answers to the poll will be revealed :)
But that is interesting how people's opinions diverge