Questions tagged [self-validating]
A restricted-source challenge where the task is to check the source restriction. This means when fed itself as input the program must output true.
4
questions
82
votes
41
answers
12k
views
Non-discriminating Programming
We say a string is non-discriminating if each of the string's characters appears the same number of times and at least twice.
Examples
"aa!1 1 !a !1" is non-...
- 26.1k
40
votes
12
answers
2k
views
A well linked challenge
An activity I sometimes do when I'm bored is to write a couple of characters in matching pairs. I then draw lines (over the tops never below) to connect these characters. For example I might write \$...
- 96.5k
23
votes
16
answers
3k
views
A Semi-palindrome Puzzle
An palindrome is a word that is its own reverse.
Now there are some words that might look like palindromes but are not. For example consider the word sheesh, <...
- 96.5k
19
votes
12
answers
2k
views
In for a bumpy ride
Your task is to write a computer program or function that takes a list of nonnegative integers of at least length 2 and determines if they are a "zigzag". A sequence is a zigzag if and only ...
- 96.5k