Questions tagged [palindrome]
Palindromes are words, phrases, representations of numbers or times which read the same in reverse, for example "level", "reviver", "12321", "10:01". See also the [balanced-string] tag.
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Pretty Palintiples
Imagine you have a positive integer number \$n\$. Let \$m\$ be the number obtained by reversing \$n\$'s digits. If \$m\$ is a whole multiple of \$n\$, then \$n\$ is said to be a reverse divisible ...
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Numbers that can be negated by reading backwards
Balanced ternary is a modified version of ternary (base 3), using the three digits 1,0 and -1...
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making a binary string palindrome using xor operations [closed]
Problem
You are given a binary string A of length N.
You can perform the following type of operation on the string A:
Choose two different indices \$i\$ and \$j\$ (\$1 \le i\$, \$j \le N\$)
Change \$...
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Farigiraf my Girafarig
A palindrome is a word that is its own reverse. I will define the left palindromic root of a word as the shortest prefix of the word for which the shortest possible palindrome that begins with that ...
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Is it an alphadrome?
An alphadrome is a word in which each letter in the first half of the word "reflects" its alphabetical "opposite" in the second half of the word. Write a program or function that ...
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Rotatable numbers (Upside down) [duplicate]
Searching for rotatable numbers, like: 68089
If you consider numbers upside-down,
6 looks like ...
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Have you heard of tralindromes?
I haven't. :P So I decided to define one:
A tralindrome is a string which contains three equal-length sections X, Y, Z such that
all characters in the string are included in at least one of the three ...
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Rearrange to a palindrome
Given a string, shuffle it so that it becomes a palindrome.
For example, adadbcc can be arranged into dacbcad, or ...
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Palindromic Powers
Powers
We define an important power as a number that can be represented as \$ x^y \$ where \$ x ≥ 2 \$ and \$ y ≥ 2 \$.
Palindrome
We define an ...
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Recursive palindromes
A palindrome is a word which is spelled the same backwards and forwards. For example, "racecar" is a palindrome as is "redder". A double palindrome is a palindrome whose halves are ...
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The Most Palindromy Code to Calculate Palindromy Numbers
The string
abaaba
Is a palindrome, meaning it doesn't change when it's reversed. However we can split it in half to make two palindromes
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Tips on golfing this Python program to generate a palindrome from a string
I wrote this function in 48 bytes and I wonder, is there any way to write this code 2 characters shorter?
p=lambda n,c:(n*c)[:n//2]+(n*c)[:n//2+n%2][::-1]
The ...
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I palindrome the source code, you palindrome the input!
This is a rip-off of a rip-off of a rip-off of a rip-off of a rip-off. Go upvote those!
Your task, if you accept it, is to write a program/function that outputs/returns its input/args. The tricky ...
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Based Palindromes
A palindromic number, as a refresher, is any number which reads the same forward as backwards. However, what about palindromes in other bases?
Input
Any integer b ...
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Squarefree Palindromes [closed]
Create the shortest function, program, or expression that calculates a sequence of squarefree palindromic numbers.
A squarefree number is one which is not evenly divisible by a square number (i.e. ...
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