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Doaa H Alshawwa

Java Competitive Programmer | PCPC Contestant 🏆 Documenting my raw journey from Gray to Red on Codeforces.

Location Gaza, Palestine Joined Joined on  github website

Education

B.S. in Cyber Security Engineering – UCAS

Pronouns

she

Work

Competitive Programmer & Student

Gray to Red #1 (Study Journey): Replacing Heavy Array Slicing with (i + 1) % n
doaaa_04 profile

Gray to Red #1 (Study Journey): Replacing Heavy Array Slicing with (i + 1) % n

#java #competitiveprogramming #algorithms #codeforces
Comments
3 min read

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Checking 800M Leaked Passwords in 2MB of RAM with Bloom Filters
doaaa_04 profile

Checking 800M Leaked Passwords in 2MB of RAM with Bloom Filters

#javascript #node #security #algorithms
Comments
4 min read
Blocking Millions of Malicious IPs in O(32) Time with Bitwise Tries
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Blocking Millions of Malicious IPs in O(32) Time with Bitwise Tries

#javascript #node #security #algorithms
Comments 2
4 min read
Why Fixed-Window Rate Limiters Fail (And How to Fix Them with Math)
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Why Fixed-Window Rate Limiters Fail (And How to Fix Them with Math)

#node #javascript #security #algorithms
Comments
3 min read
How I Stop Webhook Replay Attacks in Node.js & PostgreSQL
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How I Stop Webhook Replay Attacks in Node.js & PostgreSQL

#security #node #postgres #fintech
Comments
3 min read
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