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index.js
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/*
* @Copyright https://github.com/takayama-lily/syanten
*/
(()=>{
'use strict'
const sum = (arr)=>{
let s = 0
for (let i = 0; i < arr.length; i++)
s += arr[i]
return s
}
const syanten = (hai_arr)=>{
let res = 9
let mentsu, tatsu, alone, furo
mentsu = tatsu = alone = furo = 0
const search = (arr, is_jihai = false)=>{
const searchHelper = (arr,index,is_jihai =false,mentsu,tatsu,alone) => {
let tmp = [0,0,0]
let max = [mentsu,tatsu,alone]
if (index === (is_jihai ? 7 : 9)){
return max;
}
if (arr[index] === 0){
tmp = searchHelper(arr,index+1,is_jihai,mentsu,tatsu,alone)
if (tmp > max){
max = tmp
}
}
if (arr[index] >= 3){
arr[index] -= 3
tmp = searchHelper(arr,index,is_jihai,mentsu+1,tatsu,alone)
if (tmp > max){
max = tmp
}
arr[index] += 3
}
if (arr[index] >= 2){
arr[index] -= 2
tmp = searchHelper(arr,index,is_jihai,mentsu,tatsu+1,alone)
if (tmp > max){
max = tmp
}
arr[index] += 2
}
if (arr[index] >= 1){
arr[index] -= 1
tmp = searchHelper(arr,index,is_jihai,mentsu,tatsu,alone+1)
if (tmp > max){
max = tmp
}
arr[index] += 1
}
if (!is_jihai){
if (arr[index] > 0 && arr[index + 1] > 0 && arr[index + 2] > 0){
arr[index]--, arr[index + 1]--, arr[index + 2]--
tmp = searchHelper(arr,index,is_jihai,mentsu+1,tatsu,alone)
if (tmp > max){
max = tmp
}
arr[index]++, arr[index + 1]++, arr[index + 2]++
}
if (arr[index] > 0 && arr[index + 2] > 0){
arr[index]--, arr[index + 2]--
tmp = searchHelper(arr,index,is_jihai,mentsu,tatsu+1,alone)
if (tmp > max){
max = tmp
}
arr[index]++, arr[index + 2]++
}
if (arr[index] > 0 && arr[index + 1] > 0){
arr[index]--, arr[index + 1]--
tmp = searchHelper(arr,index,is_jihai,mentsu,tatsu+1,alone)
if (tmp > max){
max = tmp
}
arr[index]++, arr[index + 1]++
}
}
return max
}
let tmp = searchHelper(arr,0,is_jihai,0,0,0)
mentsu += tmp[0], tatsu += tmp[1], alone += tmp[2]
}
const calc = ()=>{
let tmp_res = -1
while (mentsu < 4 - furo) {
if (tatsu && alone) {
tatsu--, alone--, mentsu++, tmp_res++
continue
}
if (tatsu && !alone) {
tatsu--, alone++, mentsu++, tmp_res++
continue
}
if (!tatsu && alone) {
alone -= 2, mentsu++, tmp_res += 2
}
}
if (alone > 0) tmp_res++
res = tmp_res < res ? tmp_res : res
mentsu = tatsu = alone = 0
}
hai_arr = [[...hai_arr[0]], [...hai_arr[1]], [...hai_arr[2]], [...hai_arr[3]]]
let arr = [...hai_arr[0], ...hai_arr[1], ...hai_arr[2], ...hai_arr[3]]
let s = sum(arr)
if (s > 14 || s % 3 === 0)
return -2
furo = Math.round((14 - s) / 3)
if (s % 3 === 1) {
for (let i = 33;;i--) {
if (!arr[i]) {
arr[i]++
hai_arr[Math.floor(i / 9)][i % 9]++
break
}
}
}
for (let i = 0; i < 34; i++) {
if (arr[i] === 0)
continue
let t = []
t[0] = [...hai_arr[0]], t[1] = [...hai_arr[1]], t[2] = [...hai_arr[2]], t[3] = [...hai_arr[3]]
t[Math.floor(i / 9)][i % 9] -= arr[i] >= 2 ? 2 : arr[i]
search(t[0])
search(t[1])
search(t[2])
search(t[3], true)
calc()
}
return res
}
const syanten7 = (hai_arr)=>{
let cnt = sum(hai_arr[0]) + sum(hai_arr[1]) + sum(hai_arr[2]) + sum(hai_arr[3])
if (cnt < 13 || cnt > 14)
return -2
let arr = [...hai_arr[0], ...hai_arr[1], ...hai_arr[2], ...hai_arr[3]]
let s = 0, t = 0
for (let i = 0; i < 34; i++) {
if (arr[i] >= 2) s++
if (arr[i] === 1) t++
}
if (s + t >= 7)
return 6 - s
else
return 6 - s + (7 - s - t)
}
const syanten13 = (hai_arr)=>{
let cnt = sum(hai_arr[0]) + sum(hai_arr[1]) + sum(hai_arr[2]) + sum(hai_arr[3])
if (cnt < 13 || cnt > 14)
return -2
let arr = [hai_arr[0][0], hai_arr[0][8], hai_arr[1][0], hai_arr[1][8], hai_arr[2][0], hai_arr[2][8], ...hai_arr[3]]
let s = 0, t = 0
for (let i = 0; i < 13; i++) {
if (arr[i]) s++
if (arr[i] > 1) t = 1
}
return 13 - s - t
}
const syantenAll = (hai_arr)=>{
let s7 = syanten7(hai_arr)
let s13 = syanten13(hai_arr)
if (s7 === -2 || s13 === -2)
return syanten(hai_arr)
else
return Math.min(syanten(hai_arr), s7, s13)
}
const MPSZ = ['m', 'p', 's', 'z']
const hairi = (hai_arr, is7or13 = false)=>{
let syantenCalc = !is7or13 ? syanten : (haiArr)=>{
return Math.min(syanten7(haiArr), syanten13(haiArr))
}
let sht = syantenCalc(hai_arr)
let res = {now: sht}
if (sht < 0)
return res
let self = []
const calcHairi = ()=>{
let map = {}
for (let i = 0; i < 4; i++) {
for (let ii = 0; ii < 9; ii++) {
if (hai_arr[i][ii] === undefined)
continue
if (i === self[0] && ii === self[1])
continue
if (!is7or13 && i == 3 && hai_arr[i][ii] === 0)
continue
if (!is7or13 && i < 3 && (hai_arr[i][ii] === 0 && !hai_arr[i][ii-1] === 0 && !hai_arr[i][ii-2] === 0 && !hai_arr[i][ii+1] === 0 && !hai_arr[i][ii+1] === 0))
continue
hai_arr[i][ii]++
if (syantenCalc(hai_arr) < sht) {
map[ii+1+MPSZ[i]] = 5 - hai_arr[i][ii]
}
hai_arr[i][ii]--
}
}
return map
}
if ((sum(hai_arr[0]) + sum(hai_arr[1]) + sum(hai_arr[2]) + sum(hai_arr[3])) % 3 === 1) {
res.wait = calcHairi()
return res
}
for (let i = 0; i < 4; i++) {
for (let ii = 0; ii < 9; ii++) {
if (hai_arr[i][ii] === 0 || hai_arr[i][ii] === undefined)
continue
hai_arr[i][ii]--
if (syantenCalc(hai_arr) === sht) {
self = [i, ii]
res[ii+1+MPSZ[i]] = calcHairi()
}
hai_arr[i][ii]++
}
}
return res
}
const exports = syantenAll
exports.syanten = syanten
exports.syanten7 = syanten7
exports.syanten13 = syanten13
exports.syantenAll = syantenAll
exports.hairi = hairi
if (typeof module === 'object' && module && module.exports) {
module.exports = exports
}
else if (typeof define === 'function' && define.amd) {
define(()=>{
return exports
})
}
else if (typeof self === 'object' && self) {
self.syanten = exports
}
})()