The Knife of Never Letting Go is a young-adult novel by Patrick Ness, published by Walker Books in May 2008. It inaugurated the Chaos Walking series, was celebrated by critics, and won annual awards including the Booktrust Teenage Prize, the Guardian Award, and the James Tiptree, Jr. Award.
The Knife was Ness's first work for children or young adults. According to The Guardian's coverage of its award, "He turned to children's fiction after he had the idea for a world where it is impossible to escape information overload, and knew it was right for teenagers."
== Plot summary ==
Todd Hewitt is the...
2
Recently, an answer to my question was given in x86_64 machine code, with a score of 10 bytes. Now I didn't think much of this until Peter Taylor brought up that the program is actually 142 bytes. The author of the answer contested that it was 142 bytes in assembly, not machine code.
So who is r...
Undo the Fundamental Transformation on permutations code-golf
A permutation like
[3, 5, 1, 4, 5, 6]
1->3, 2->5, 3->1, 4->2, 5->4, 6->6
can be written as a union of cycles:
(31)(542)(6)
There's many ways to write these cycles, but we fix a canonical form by requiring that:
In each cycle...
Fond Memories of Past Primes
Consider a prime number p, written in base 10. The memory of p is defined as the number of primes less than p that are contained as substrings of p (without leading zeros).
Challenge
Given an integer n as input, find the smallest prime p such that p has memory n. T...
Python 3, 443 158 155 154 134 131 128 124 117 bytes
c=d=C=D=0
for e in input():v='[<>,.-+]'.find(e);d=d*8+v;c+=(c<0<6<v)-(d>0==v);C,D=(c,C+1,d,D)[v>6::2]
print(-~D*8**C)
Several bytes thanks to Sp3000 and Mitch Schwartz :D
How this works:
This maps all valid BF programs into all possible, ...
