Hot Linked Questions

112 votes

336 answers

22k views

Simple cat program

One of the most common standard tasks (especially when showcasing esoteric programming languages) is to implement a "cat program": read all of STDIN and print it to STDOUT. While this is ...

Martin Ender

197k

asked Oct 30, 2015 at 16:16

150 votes

162 answers

22k views

I double the source, you double the output!

Your task, if you wish to accept it, is to write a program that outputs a positive integer (higher than 0). The tricky part is that if I duplicate your source code, the output must be double the ...

Mr. Xcoder

42.5k

asked Jul 15, 2017 at 15:14

118 votes

76 answers

28k views

I'm a palindrome. Are you?

There have been a couple of previous attempts to ask this question, but neither conforms to modern standards on this site. Per discussion on Meta, I'm reposting it in a way that allows for fair ...

user62131

asked Feb 20, 2017 at 1:34

57 votes

72 answers

11k views

I reverse the source code, you negate the output!

Your task, if you wish to accept it, is to write a program that outputs a non-zero number(can be integer or float). The tricky part is that if I reverse your source code, the output must be the ...

TwilightSparkle

3,946

asked Sep 17, 2019 at 13:38

44 votes

69 answers

9k views

I reverse the source code, you negate the input!

Blatant rip-off of a rip-off. Go upvote those! Your task, if you wish to accept it, is to write a program/function that outputs/returns its integer input/argument. The tricky part is that if I ...

Adám

31.1k

asked Sep 17, 2019 at 19:32

38 votes

25 answers

6k views

I transpose the source code, you transpose the input!

Rip-off of a rip-off of a rip-off of a rip-off. Go upvote those! Your task, if you wish to accept it, is to write a program/function that outputs/returns its input/argument¹. The tricky part is that ...

Adám

31.1k

asked Sep 22, 2019 at 12:08

28 votes

24 answers

7k views

I shift the source code, you shift the input!

Sandbox A spin-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/argument. The ...

lyxal

34.3k

asked Dec 10, 2019 at 20:27

19 votes

25 answers

3k views

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 ...

okie

1,807

asked Mar 24, 2021 at 7:06

23 votes

10 answers

2k views

I (rev)?(pal)? the source code, you (rev)?(pal)? the input!

Just because the reverse and palindrome were not too challenging individually :) Write a program (full program or function) that satisfies the following: given a string input, the program as-is ...

Bubbler

78.4k

asked Sep 27, 2023 at 6:33

7 votes

19 answers

2k views

To count the sum of all Unicode characters of a given input under an interesting constraint

Program: To count the sum of all Unicode characters of a given input. (No need to display the output. The final answer can be calculated in any base no need to convert back to hexadecimal.) Test case :...

Aatmaj

243

asked Mar 25, 2021 at 10:02

4 votes

6 answers

592 views

I Rot-13 the source code, you Rot-19 the output!

This is alternate of a rip-off of 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 ...