02/01/26 18:32
>>225の9Hから。
9H
A------+------+------+------+(0/1)→
B------+------+------+------+(0/1)
+------+------+------+------C(1/1)
+------+------+------D------+(3/4)→
9+6/7H
+------+------+------+--A---+(6/7)←←
B------+------+------+------+(0/1)
+------+------+------+------C(1/1)
+------+------+------+--D---+(6/7)
10+5/7H
A------+------+------+------+(0/1)→
B------+------+------+------+(0/1)→
+------+------+------+------C(1/1)
+------+------+------+--D---+(6/7)
11+4/7H
+------+------+------+--A---+(6/7)
+------+----B-+------+------+(3/7)→
+------+------+------+------C(1/1)
+------+------+------+--D---+(6/7)→
12+3/7H
+------+------+------+--A---+(6/7)乗船
+------+------+------+--B---+(6/7)
+------+------+------+------C(1/1)
+------+------+------+-----D+(27/28)乗船
ここで12+3/7Hと9Hを比較すると、
全船ゴールまでの距離が1/7になっているだけ。
これを無限回繰り返すと13Hで到着します。