HSCTF 4 Writeups
Overview
Introduction
Problems
Algo
100 - Coin Flip
200 - Ping Pong 200
300 - Digital Digits
300 - Max's Maximal Triangles
300 - Pascal's Triangle
400 - Magic Matrices
400 - Bob's Bubble Tea Machine I
400 - Bob's Bubble Tea Machine II
500 - Large Primes
300 - Digital Digits
Crypto
100 - Quartenary
100 - Hidden Polynomials
200 - Alice and Bob
200 - Keith and Dawg 2
200 - Gibberish
Reversal
400 - Keith and Dawg 4
500 - Keith and Dawg 5
Forensics
100 - Keith and Dawg 1
100 - Basic Bucketfill
200 - Easy Stegosaurus
300 - Hard Stegosaurus
Exploitation
100 - Python Exploitation 1
200 - Python Exploitation 2
500 - Keith and Dawg 6
Solutions
Algo
100 - Coin Flip
200 - Ping Pong 200
300 - Max's Maximal Triangles
300 - Ping Pong 300
300 - Pascal's Triangle
400 - Magic Matrices
400 - Bob's Bubble Tea Machine I
400 - Bob's Bubble Tea Machine II
400 - Grid
500 - Large Primes
400 - Grid
Crypto
100 - Quartenary
100 - Hidden Polynomials
200 - Alice and Bob
200 - Keith and Dawg 2
200 - Gibberish
Reversal
400 - Keith and Dawg 4
500 - Keith and Dawg 5
100 - Keithor
200 - KE1TH
300 - Lost Keith
400 - Keith Fish
Forensics
100 - Keith and Dawg 1
100 - Basic Bucketfill
200 - An Intense Rivalry
200 - Easy Stegosaurus
300 - Hard Stegosaurus
Exploitation
100 - Python Exploitation 1
100 - El Clasico
200 - Python Exploitation 2
400 - Never Say Goodbye
500 - Keith and Dawg 6
100 - Keith Overflow
100 - Keith Shell
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500 - Large Primes
Large Primes
By Alan Yan
Flag: 138379157
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