I was motivated for this question while seeking for a new sorting algorithm. Suppose a continuous function $f : [a, b] \to \mathbb{R}$ is given. I wanted to define the sorted version $g$ of $f$, which shall satisfy the following properties: $g$ monotone increases $g(a)$ is the global minimum of ...

Decode Triple G Start On the TV cooking show Guy's Grocery Games, the chefs cannot begin shopping until Guy Fieri, the show's host, says "Three, two, one, go!" However, the words do not have to be all together. He often "hides" the words in things like this (based on a real example, but not quoti...

Format Datetime in 30-Hour Clock time code-golf date string Input a datetime, format the datetime in YYYY-MM-dd HH:mm:ss where HH in 30-hour clock time. The 30-hour clock time works as: After 6 a.m., it is same as 24-hour clock time Before 6 a.m., it use date for previous day, and plus Hours by ...

It is a well-known fact that you can colour a two-dimensional map with four colours in such a way that two countries with a common border always have different colours. There have already been enough challenges on this topic. However, the prerequisite for this is that there must be no enclaves, i...

Parse nested absolute values The absolute value of a number \$x\$ is normally written as \$|x|\$. The left and right side of the absolute value uses the same symbol, so it is not immediately obvious how to parse nested absolute values e.g. \$||1-2|+|3-|4-5|||\$ Your goal is to parse such an expre...

Clone GNU cat Write a program that precisely clones GNU cat version 8.32, which is installed on my computer. In any case, if called with the same arguments, same stdin, and same files, your program's output to both stdout and stderr must by byte-for-byte identical to that of GNU cat, and the exit...

Kotlin, 46 bytes {x:Int->x.downTo(1).reduceOrNull{a,i->a*i}?:1} Bit of a shame that we need that type hint... Attempt This Online!