{ "data": { "question": { "questionId": "2645", "questionFrontendId": "2582", "categoryTitle": "Algorithms", "boundTopicId": 2145037, "title": "Pass the Pillow", "titleSlug": "pass-the-pillow", "content": "
There are n
people standing in a line labeled from 1
to n
. The first person in the line is holding a pillow initially. Every second, the person holding the pillow passes it to the next person standing in the line. Once the pillow reaches the end of the line, the direction changes, and people continue passing the pillow in the opposite direction.
nth
person they pass it to the n - 1th
person, then to the n - 2th
person and so on.Given the two positive integers n
and time
, return the index of the person holding the pillow after time
seconds.
\n
Example 1:
\n\n\nInput: n = 4, time = 5\nOutput: 2\nExplanation: People pass the pillow in the following way: 1 -> 2 -> 3 -> 4 -> 3 -> 2.\nAfer five seconds, the pillow is given to the 2nd person.\n\n\n
Example 2:
\n\n\nInput: n = 3, time = 2\nOutput: 3\nExplanation: People pass the pillow in the following way: 1 -> 2 -> 3.\nAfer two seconds, the pillow is given to the 3rd person.\n\n\n
\n
Constraints:
\n\n2 <= n <= 1000
1 <= time <= 1000
n
个人站成一排,按从 1
到 n
编号。
最初,排在队首的第一个人拿着一个枕头。每秒钟,拿着枕头的人会将枕头传递给队伍中的下一个人。一旦枕头到达队首或队尾,传递方向就会改变,队伍会继续沿相反方向传递枕头。
\n\nn
个人时,TA 会将枕头传递给第 n - 1
个人,然后传递给第 n - 2
个人,依此类推。给你两个正整数 n
和 time
,返回 time
秒后拿着枕头的人的编号。
\n\n
示例 1:
\n\n\n输入:n = 4, time = 5\n输出:2\n解释:队伍中枕头的传递情况为:1 -> 2 -> 3 -> 4 -> 3 -> 2 。\n5 秒后,枕头传递到第 2 个人手中。\n\n\n
示例 2:
\n\n\n输入:n = 3, time = 2\n输出:3\n解释:队伍中枕头的传递情况为:1 -> 2 -> 3 。\n2 秒后,枕头传递到第 3 个人手中。\n\n\n
\n\n
提示:
\n\n2 <= n <= 1000
1 <= time <= 1000
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