Oct 18, 2025 · 4 I'm resolving a problem from CodeForces: C. Beautiful XOR. This is what the code is supposed to do: You have two numbers a and b. You must transform a into b using …

Apr 30, 2020 · Weaknesses of xor encryption, including but not limited to the encryption function is the decryption function.

Nov 10, 2020 · I am trying to resolve below question in order to prepare for an interview xD An XOR linked list is a more memory efficient doubly linked list. Instead of each node holding next …

Nov 19, 2023 · Here are some utility bitwise functions for 64 bit integers. I have independently derived inv64 (inverse all bits) and pcnt64 (count bits set to 1) myself, though I am sure …

Jul 20, 2018 · This is because the xor of the first two will return false and then the xor of false with the third one's value will return true. It is easy to handle this case specifically. (!a || !b || !c) will …

Jul 15, 2020 · As five of the first six challenges are XOR related problems I thought it would be a good idea to compile my work into a single program capable of encrypting, decrypting, and …

Feb 11, 2020 · The XOR loops don't seem to consider any of the input string after the first HASH_LENGTH characters. That means you'll get lots of collisions for strings sharing a …

Aug 14, 2021 · Are there some efficient ways to calculate a XOR (b+1) known a XOR b? The pattern, to me, suggests that it might be possible, but I'm not smart enough to find a solution...

Dec 12, 2015 · I've written a program that encrypts files (or stdin) with a user-specified key from 1 to 255. This "encryption" is very insecure, but still a bit better than ROT13 (at least for people …

Jul 4, 2016 · 1 This XOR function is costing my program too much time (specifically the conversions.) How can this code be made faster?