Code dump for 2.16
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In the previous example we considered a space which has only one road looping back on itself. The number of times you would walk around the road to get back to the “same” point (or an equivalent point in a different copy) can be encoded using this “winding number” trick:
利用者ピーク時の4分の1に激減 でも元気なスキー場も なぜ？