Failure on the factory floor!! One box of 'deluxe' ball-bearings has been mixed in with all the boxes of 'normal' ball-bearings! We need your help to identify the right box! Information What yo...
The "Berlin Clock" is the first public clock in the world that tells the time by means of illuminated, coloured fields, for which it entered the Guinness Book of Records upon its installation on 17...
This is the SUPER performance version of This kata. You task is exactly the same as that kata. But this time, you should output result % 998244353, or otherwise the result would be too large. D...
You are going to be given a non-empty string. Your job is to return the middle character(s) of the string. If the string's length is odd, return the middle character. If the string's length i...
You have a positive number n consisting of digits. You can do at most one operation: Choosing the index of a digit in the number, remove this digit at that index and insert it back to another or ...
Story A freak power outage at the zoo has caused all of the electric cage doors to malfunction and swing open... All the animals are out and some of them are eating each other! It's a Zoo Dis...
If you're not familiar with nonograms, I recommend you to check this wikipedia page: Nonogram - Wikipedia. My friend Alex really likes to solve nonograms, and I've drawn one for him: How...
This challenge is to compute a special set of parasitic numbers for various number bases. An n-parasitic number (in base 10) is a positive natural number which can be multiplied by n by moving ...