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Chess converter
There's quite a lot of work that's been done in the world of chess. For example, there is a standardized file format, .pgn, that describes a chess game, including the list of moves. Additionally, there's another file format .fen, that describes a board position. The challenge ...
The imperial and US customary systems of measurement are two closely inter-related systems of measurement both derived from earlier English system of measurement units which can be traced back to Ancient Roman units of measurement, and Carolingian and Saxon units of measure.
US Customary units, developed and used in the United States after the American Revolution, are based on a subset of the English units used in the Thirteen Colonies, while the Imperial system of units was developed and used after 1824 in the United Kingdom and subsequently used in the rest of the Commonwealth. US Customary units...
Greek numerals is a system of representing numbers using the letters of the Greek alphabet. These alphabetic numerals are also known by names Ionic or Ionian numerals, Milesian numerals, and Alexandrian numerals. In modern Greece, they are still used for ordinal numbers and in situations similar to those in which Roman numerals are still used elsewhere in the West. For ordinary cardinal numbers, however, Greece uses Arabic numerals.
== History ==
The Minoan and Mycenaean civilizations' Linear A and Linear B alphabets used a different system, called Aegean numerals, which included speciali...
Write a program or function that takes in a nonempty single-line string. You may assume it only contains printable ASCII excluding space.
Print or return an ASCII art lozenge shape similar to a lemon or lime made from the prefixes of the string.
For example, if the input is Lemon, the output sh...
A Proth number, named after François Proth, is a number that can be expressed as
N = k * 2^n + 1
Where k is an odd positive integer and n is a positive integer such that 2^n > k. Let's use a more concrete example. Take 3. 3 is a Proth number because it can be written as
(1 * 2^1) + 1
and 2^1 >
