2582.Pillow

topic：

2582.Pillow.md

Thought：

math题，Find a rule，npersonal，interval=n-1，The number of cycles in the crowd= $time // (n-1)$，The number of cycles is2The number of times from scratch，Otherwise, the number of forwards from the back。

Code：

class Solution:
    def passThePillow(self, n: int, time: int) -> int:
        if n > time:
            return time + 1
        if time // (n-1) % 2 == 0:
            return time % (n-1) + 1
        else:
            return n - time % (n-1)