using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
//ピースごとの配置候補
static List<bool[,]> HaitiKouhoList;
static int mQuestionNo = 1;
static char[,] mQuestionArr; //問題の初期盤面
static int UB_X;
static int UB_Y;
struct JyoutaiDef
{
internal char[,] BanArr;
internal int CurrX;
internal int CurrY;
internal int PieceCnt;
internal int PassCnt;
}
//問題を定義
static void QuestionDef()
{
if (mQuestionNo == 1) { UB_X = 8 - 1; UB_Y = 8 - 1; }
if (mQuestionNo == 2) { UB_X = 9 - 1; UB_Y = 6 - 1; }
if (mQuestionNo == 3) { UB_X = 10 - 1; UB_Y = 10 - 1; }
if (mQuestionNo == 4) { UB_X = 5 - 1; UB_Y = 5 - 1; }
mQuestionArr = new char[UB_X + 1, UB_Y + 1];
for (int X = 0; X <= UB_X; X++)
for (int Y = 0; Y <= UB_Y; Y++)
mQuestionArr[X, Y] = ' ';
if (mQuestionNo == 4) {
mQuestionArr[0, 0] = mQuestionArr[4, 0] = '*';
mQuestionArr[2, 2] = '*';
mQuestionArr[0, 4] = mQuestionArr[4, 4] = '*';
}
}
static void Main()
{
var sw = System.Diagnostics.Stopwatch.StartNew();
//問題を定義
QuestionDef();
HaitiKouhoList = DeriveHaitiKouhoList();
var Stk = new Stack<JyoutaiDef>();
JyoutaiDef WillPush;
WillPush.BanArr = mQuestionArr;
WillPush.CurrX = WillPush.CurrY = 0;
WillPush.PieceCnt = 0;
WillPush.PassCnt = 0;
Stk.Push(WillPush);
while (Stk.Count > 0) {
JyoutaiDef Popped = Stk.Pop();
//クリア判定
if (mQuestionNo == 1 && Popped.PieceCnt == 11
|| mQuestionNo == 2 && Popped.PieceCnt == 9
|| mQuestionNo == 3 && Popped.PieceCnt == 18
|| mQuestionNo == 4 && Popped.PieceCnt == 4) {
Console.WriteLine("解を発見。経過時間={0}", sw.Elapsed);
PrintBan(Popped.BanArr);
break;
}
//Y座標の繰上げ処理
if (Popped.CurrY > UB_Y) {
Popped.CurrY = 0;
Popped.CurrX++;
if (mQuestionNo == 3) {
//特殊枝切り1
if (Popped.CurrX == 1) {
int UeCnt = 0;
for (int Y = 0; Y <= 4; Y++)
if (Popped.BanArr[0, Y] == ' ')
UeCnt++;
int ShitaCnt = 0;
for (int Y = 5; Y <= 9; Y++)
if (Popped.BanArr[0, Y] == ' ')
ShitaCnt++;
if (UeCnt > ShitaCnt) continue;
}
//特殊枝切り2
if (Popped.CurrX == 5 && Popped.PieceCnt < 18 / 2)
continue;
}
}
//解に到達しない場合
if (Popped.CurrX >= UB_X - 1) continue;
//ピースの配置候補リスト
List<bool[,]> wkHaitiKouhoList = new List<bool[,]>();
wkHaitiKouhoList.AddRange(HaitiKouhoList);
//マス目にピースを埋めれない候補をRemove
wkHaitiKouhoList.RemoveAll(X =>
CanFillPiece(X, Popped.CurrX, Popped.CurrY, Popped.BanArr) == false);
//10進数をchar型に変換
Func<int, char> DecToStr = (pInt) =>
{
if (pInt < 10) return (char)((int)'1' + pInt - 1);
return (char)((int)'A' + pInt - 10);
};
//ピースを配置する経路のPush処理
foreach (bool[,] EachPieceMap in wkHaitiKouhoList) {
WillPush.BanArr = (char[,])Popped.BanArr.Clone();
WillPush.CurrX = Popped.CurrX;
WillPush.CurrY = Popped.CurrY;
WillPush.PieceCnt = Popped.PieceCnt + 1;
WillPush.PassCnt = Popped.PassCnt;
for (int X = 0; X <= EachPieceMap.GetUpperBound(0); X++) {
for (int Y = 0; Y <= EachPieceMap.GetUpperBound(1); Y++) {
if (EachPieceMap[X, Y] == false) continue;
WillPush.BanArr[Popped.CurrX + X, Popped.CurrY + Y] =
DecToStr(WillPush.PieceCnt);
}
}
Stk.Push(WillPush);
}
//ピースを配置しない経路のPush
WillPush.BanArr = Popped.BanArr;
WillPush.CurrX = Popped.CurrX;
WillPush.CurrY = Popped.CurrY + 1;
WillPush.PieceCnt = Popped.PieceCnt;
WillPush.PassCnt = Popped.PassCnt;
if (Popped.BanArr[Popped.CurrX, Popped.CurrY] == ' ')
WillPush.PassCnt++;
if (mQuestionNo == 1 && WillPush.PassCnt > 9) continue;
if (mQuestionNo == 2 && WillPush.PassCnt > 9) continue;
if (mQuestionNo == 3 && WillPush.PassCnt > 10) continue;
if (mQuestionNo == 4 && WillPush.PassCnt > 0) continue;
//特殊枝切り3
if (mQuestionNo <= 3) {
if (WillPush.BanArr[0, 0] == ' '
&& WillPush.BanArr[1, 0] == ' '
&& WillPush.BanArr[2, 0] == ' ')
continue;
}
Stk.Push(WillPush);
}
}
//ピース名を引数として、回転させた配置のListを返す
static List<bool[,]> DeriveHaitiKouhoList()
{
bool[,] wkArr = null;
// ■■
//■■
// ■
wkArr = new bool[3, 3];
wkArr[1, 0] = wkArr[2, 0] = true;
wkArr[0, 1] = wkArr[1, 1] = true;
wkArr[1, 2] = true;
return DeriveKaitenArrList(wkArr);
}
//配列を引数として、回転させた配列のリストをDistinctして返す
static List<bool[,]> DeriveKaitenArrList(bool[,] pBaseArr)
{
var KaitenArrList = new List<bool[,]>();
int BaseArrUB_X = pBaseArr.GetUpperBound(0);
int BaseArrUB_Y = pBaseArr.GetUpperBound(1);
for (int I = 1; I <= 8; I++) KaitenArrList.Add(null);
for (int P = 0; P <= 6; P += 2) KaitenArrList[P] = new bool[BaseArrUB_X + 1, BaseArrUB_Y + 1];
for (int P = 1; P <= 7; P += 2) KaitenArrList[P] = new bool[BaseArrUB_Y + 1, BaseArrUB_X + 1];
for (int X = 0; X <= BaseArrUB_X; X++) {
for (int Y = 0; Y <= BaseArrUB_Y; Y++) {
bool SetVal = pBaseArr[X, Y];
KaitenArrList[0][X, Y] = SetVal;
KaitenArrList[1][Y, BaseArrUB_X - X] = SetVal;
KaitenArrList[2][BaseArrUB_X - X, BaseArrUB_Y - Y] = SetVal;
KaitenArrList[3][BaseArrUB_Y - Y, X] = SetVal;
KaitenArrList[4][X, BaseArrUB_Y - Y] = SetVal;
KaitenArrList[5][BaseArrUB_Y - Y, BaseArrUB_X - X] = SetVal;
KaitenArrList[6][BaseArrUB_X - X, Y] = SetVal;
KaitenArrList[7][Y, X] = SetVal;
}
}
//Distinctする
for (int I = KaitenArrList.Count - 1; 0 <= I; I--) {
for (int J = 0; J <= I - 1; J++) {
if (KaitenArrList[I].GetUpperBound(0) !=
KaitenArrList[J].GetUpperBound(0)) continue;
if (KaitenArrList[I].GetUpperBound(1) !=
KaitenArrList[J].GetUpperBound(1)) continue;
IEnumerable<bool> wkEnum1 = KaitenArrList[I].Cast<bool>();
IEnumerable<bool> wkEnum2 = KaitenArrList[J].Cast<bool>();
if (wkEnum1.SequenceEqual(wkEnum2) == false) continue;
KaitenArrList.RemoveAt(I);
break;
}
}
return KaitenArrList;
}
//マス目にピースを埋めれるか
static bool CanFillPiece(bool[,] pPieceMap, int pTargetX, int pTargetY, char[,] pBanArr)
{
if (pTargetX + pPieceMap.GetUpperBound(0) > UB_X) return false;
if (pTargetY + pPieceMap.GetUpperBound(1) > UB_Y) return false;
for (int X = 0; X <= pPieceMap.GetUpperBound(0); X++) {
for (int Y = 0; Y <= pPieceMap.GetUpperBound(1); Y++) {
if (pPieceMap[X, Y] && pBanArr[pTargetX + X, pTargetY + Y] != ' ')
return false;
}
}
return true;
}
//盤面を出力
static void PrintBan(char[,] pBanArr)
{
var sb = new System.Text.StringBuilder();
for (int Y = 0; Y <= UB_Y; Y++) {
for (int X = 0; X <= UB_X; X++) {
sb.Append(pBanArr[X, Y] == ' ' ? '/' : pBanArr[X, Y]);
}
sb.AppendLine();
}
Console.WriteLine(sb.ToString());
}
}
問題1 ８×８の正方形 (すき間9単位)
問題2 ６×９の長方形 (すき間9単位) 解数は2 問題3 10×10の正方形 (すき間10単位) 解数は4 問題4 下記の形
