The decomposition 345 345 345 345 66 would score the same, while 333 345 444 555 66 scores worse. + all trip.ġ1112233344555 -> 5 # 111 123 234 345 55, flush onlyįor the fifth example, despite having two pairs of identical sequences, only one needs to be present to attain the point. Input is a list of digits (as a string or a single flat list of integers) via STDIN, function argument or command line. fourteen tiles from 1 to 9 and each tile appearing at most four times, and may be assumed to be already sorted. The input hand is guaranteed to be valid, i.e. If a hand can be decomposed in more than one way, take the highest scoring decomposition. The score of a hand is the sum of points for the conditions it satisfies.

(Scoring here is based off Japanese mahjong rules, but heavily simplified to make the spec less messy.) Identical sequences Contains two identical sequences 1Īll sequences All sets of three are sequences 1Īll triplets All sets of three are triplets 2įlush Single-suit hand (always applies) 5 Straight Contains the sequences 123 456 789 1 Given a valid hand of fourteen tiles, determine its score based on the following criteria: Condition Description Point/s Sequences do not wrap (so 912 is invalid).Ī pair is simply two identical tiles (e.g. A sequence of three consecutive tiles (e.g.A triplet, three of the same tile (e.g.A valid hand consists of four sets of three and a pair, for a total of fourteen tiles. Tiles are numbered from 1 to 9, and there are exactly four copies of each tile.

In mahjong there are three tile suits plus honour tiles - for this challenge we will only consider hands formed using tiles from a single suit. It is typically played with four players, and the goal of the game is to be the first person to complete a valid hand using the tiles. Mahjong is a tile game that is immensely popular in Asia.

Mahjong simple sequence hand