Tagged Questions
17
votes
5answers
852 views
Count distinct primes, discarding palindromes, in under 2 seconds
Problem Statement
Generate as many distinct primes P such that reverse (P) is also prime
and is not equal to P.
Output:
Print per line one integer( ≤ 1015 ). Don't print more than
...
7
votes
2answers
136 views
Lychrel calculator (Project Euler 55)
If we take 47, reverse and add, 47 + 74 = 121, which is palindromic.
Not all numbers produce palindromes so quickly. For example,
...
3
votes
1answer
110 views
Minimum number of letters removed, to make a string Peragram
Here is the link to the problem Peragrams.
Peragrams: If a word is an anagram of at least one palindrome, we call it a Peragram.
Problem: Given a string, find the minimum number of letters ...
3
votes
1answer
1k views
Create palindrome by rearranging letters of a word
Inspired by a recent question that caught my interest (now deleted), I wrote a function in Python 3 to rearrange the letters of a given string to create a (any!) palindrome:
Count the occurrences of ...
2
votes
2answers
357 views
Project Euler, #4: Incorrect Results on 7-digit numbers
I've got my answer working (up until a 7-digit answer is requested, anyway), and would like some help
returning the correct answer
speeding up the results
I was thinking of storing the values of ...
2
votes
1answer
188 views
Python Palindrome Generator
I've just written a palindrome generator and would like to know what you think about it.
Especially:
code style
Is it possible to get the same result without making a special case for 1-digit ...
1
vote
3answers
81 views
Optimizing Project Euler 36 - double-base palindromes
This one was quick and simple. Any optimizations?
...
1
vote
6answers
1k views
The Next Palindrome - reducing total execution time
I tried to solve one SPOJ problem. I wrote one program in Python, however, it got accepted by the SPOJ judges, but its total execution time is 2.88s. The same algorithm used in C language having ...
1
vote
4answers
5k views
Simple palindrome function for single words
I have created a simple palindrome function that works only on single words. It is working as intended, but I feel that it definitely needs improvement.
...
1
vote
1answer
472 views
Reverse and Add: find a palindrome
This is one of codeeval challenges
Challenge Description:
Credits: Programming Challenges by Steven S. Skiena and Miguel A.
Revilla
The problem is as follows: choose a number, reverse ...
