diff --git a/a.cpp b/a.cpp
new file mode 100644
index 0000000..e67cd7e
--- /dev/null
+++ b/a.cpp
@@ -0,0 +1,115 @@
+#include <vector>
+#include <map>
+#include <string>
+#include <iostream>
+#include <stdio.h>
+#include <limits.h>
+#include <iostream>
+#include <math.h>
+using namespace std;
+
+class CrazyGin {
+  public:
+    long double possibility(int numMoves){
+      long long case_num = 0;
+      for(int m = 1; m <= numMoves ; m++){
+	case_num += killAt(m, numMoves);
+      }
+      long double pos = (long double)case_num;
+      for(int m = 1; m <= numMoves ; m++){
+	pos = pos / 5;
+      }
+      return pos;
+    }
+
+    long long killAt(int m, int numMoves){
+      if (m%2 == 1){
+	return 0;
+      }
+      return untilKillKing(m) * afterKillKing(numMoves - m);
+    }
+
+    // 王をm手目にちょうど倒す場合の数
+    long long untilKillKing(int m){
+      vector<int> moveX = {-1, 0, 1,-1, 1};
+      vector<int> moveY = {-1,-1,-1, 1, 1};
+      long long board[9][9] = {0}; //board[x][y]
+      long long nextBoard[9][9] = {0}; //次の内容
+      vector<int> friendPosX = {4, 5, 7, 2, 5, 2, 3, 7, 0, 1, 6, 8, 3, 5, 0, 1, 2, 4,6, 7, 8}; //王と味方の位置
+      vector<int> friendPosY = {0, 4, 3, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 7, 8, 8, 8, 8,8, 8, 8}; //王と味方の位置
+      board[4][4] = 1; //初期位置
+
+      long long numPattern = 0;
+      for(int i = 0; i < m ; i++){
+	for(int x = 0; x < 9 ; x++){
+	  for(int y = 0; y < 9 ; y++){
+	    for(int j = 0; j < moveX.size(); j++){
+	      if(x + moveX[j] >= 0 && x + moveX[j] < 9 
+		  && y + moveY[j] >= 0 && y + moveY[j] < 9){
+		nextBoard[x + moveX[j]][y + moveY[j]] += board[x][y];
+	      }
+	    }
+	  }
+	}
+	numPattern = nextBoard[4][0];
+	//nextBoardをboardにコピー。その際、味方等の位置は0に
+	for(int y = 0; y < 9 ; y++){
+	  for(int x = 0; x < 9 ; x++){
+	    board[x][y] = nextBoard[x][y];
+	    nextBoard[x][y] = 0;
+	  }
+	}
+	for(int k = 0; k < friendPosX.size(); k++){
+	  board[friendPosX[k]][friendPosY[k]] = 0;
+	}
+      }
+      return numPattern;
+    }
+
+    // 王を倒したあとremainingSteps動く場合の数
+    long long afterKillKing(int remainingSteps){
+      vector<int> moveX = {-1, 0, 1,-1, 1};
+      vector<int> moveY = {-1,-1,-1, 1, 1};
+      long long board[9][9] = {0}; //board[x][y]
+      long long nextBoard[9][9] = {0}; //次の内容
+      vector<int> friendPosX = {5, 7, 2, 5, 2, 3, 7, 0, 1, 6, 8, 3, 5, 0, 1, 2, 4,6, 7, 8}; //味方の位置
+      vector<int> friendPosY = {4, 3, 4, 4, 5, 5, 5, 6, 6, 6, 6, 7, 7, 8, 8, 8, 8,8, 8, 8}; //味方の位置
+      board[4][0] = 1; //初期位置
+      long long numPattern = 0;
+      for(int i = 0; i < remainingSteps ; i++){
+	for(int x = 0; x < 9 ; x++){
+	  for(int y = 0; y < 9 ; y++){
+	    for(int j = 0; j < moveX.size(); j++){
+	      if(x + moveX[j] >= 0 && x + moveX[j] < 9 
+		  && y + moveY[j] >= 0 && y + moveY[j] < 9){
+		nextBoard[x + moveX[j]][y + moveY[j]] += board[x][y];
+	      }
+	    }
+	  }
+	}
+	//nextBoardをboardにコピー。その際、味方等の位置は0に
+	for(int y = 0; y < 9 ; y++){
+	  for(int x = 0; x < 9 ; x++){
+	    board[x][y] = nextBoard[x][y];
+	    nextBoard[x][y] = 0;
+	  }
+	}
+	for(int k = 0; k < friendPosX.size(); k++){
+	  board[friendPosX[k]][friendPosY[k]] = 0;
+	}
+      }
+
+      for(int y = 0; y < 9 ; y++){
+	for(int x = 0; x < 9 ; x++){
+	  numPattern += board[x][y];
+	}
+      }
+      return numPattern;
+    }
+};
+
+int main(){
+  CrazyGin cg;
+  int numMoves = 20;
+  cout << cg.possibility(numMoves);
+}
diff --git a/a.out b/a.out
new file mode 100755
index 0000000..37ca55e
Binary files /dev/null and b/a.out differ
diff --git a/autoexec.sh b/autoexec.sh
new file mode 100755
index 0000000..e51d61e
--- /dev/null
+++ b/autoexec.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+if [ $# -ne 2 ]; then
+	echo "実行するには2個の引数が必要です。
+	第一引数: 監視対象ファイル名
+	第二引数: 監視対象ファイルが更新された際に実行されるコマンド
+	例： 'gcc44 -lstdc++ -std=gnu++0x a.cpp && ./a.out'"
+	exit 1
+fi
+echo "監視対象 $1"
+echo "実行コマンド $2"
+INTERVAL=1 #監視間隔, 秒で指定
+last=`ls --full-time $1 | awk '{print $6"-"$7}'`
+while true; do
+	sleep $INTERVAL
+	current=`ls --full-time $1 | awk '{print $6"-"$7}'`
+	if [ $last != $current ] ; then
+		echo ""
+		echo "updated: $current"
+		last=$current
+		eval $2
+	fi
+done