{ "data": { "question": { "questionId": "2033", "questionFrontendId": "1904", "categoryTitle": "Algorithms", "boundTopicId": 831083, "title": "The Number of Full Rounds You Have Played", "titleSlug": "the-number-of-full-rounds-you-have-played", "content": "

You are participating in an online chess tournament. There is a chess round that starts every 15 minutes. The first round of the day starts at 00:00, and after every 15 minutes, a new round starts.

\n\n\n\n

You are given two strings loginTime and logoutTime where:

\n\n\n\n

If logoutTime is earlier than loginTime, this means you have played from loginTime to midnight and from midnight to logoutTime.

\n\n

Return the number of full chess rounds you have played in the tournament.

\n\n

Note: All the given times follow the 24-hour clock. That means the first round of the day starts at 00:00 and the last round of the day starts at 23:45.

\n\n

 

\n

Example 1:

\n\n
\nInput: loginTime = "09:31", logoutTime = "10:14"\nOutput: 1\nExplanation: You played one full round from 09:45 to 10:00.\nYou did not play the full round from 09:30 to 09:45 because you logged in at 09:31 after it began.\nYou did not play the full round from 10:00 to 10:15 because you logged out at 10:14 before it ended.\n
\n\n

Example 2:

\n\n
\nInput: loginTime = "21:30", logoutTime = "03:00"\nOutput: 22\nExplanation: You played 10 full rounds from 21:30 to 00:00 and 12 full rounds from 00:00 to 03:00.\n10 + 12 = 22.\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "你完成的完整对局数", "translatedContent": "

一款新的在线电子游戏在近期发布，在该电子游戏中，以 刻钟 为周期规划若干时长为 15 分钟 的游戏对局。这意味着，在 HH:00、HH:15、HH:30 和 HH:45 ，将会开始一个新的对局，其中 HH 用一个从 00 到 23 的整数表示。游戏中使用 24 小时制的时钟 ，所以一天中最早的时间是 00:00 ，最晚的时间是 23:59 。

\n\n

给你两个字符串 startTime 和 finishTime ，均符合 \"HH:MM\" 格式，分别表示你 进入 和 退出 游戏的确切时间，请计算在整个游戏会话期间，你完成的 完整对局的对局数 。

\n\n\n\n

如果 finishTime 早于 startTime ，这表示你玩了个通宵（也就是从 startTime 到午夜，再从午夜到 finishTime）。

\n\n

假设你是从 startTime 进入游戏，并在 finishTime 退出游戏，请计算并返回你完成的 完整对局的对局数 。

\n\n

 

\n\n

示例 1：

\n\n
\n输入：startTime = \"12:01\", finishTime = \"12:44\"\n输出：1\n解释：你完成了从 12:15 到 12:30 的一个完整对局。\n你没有完成从 12:00 到 12:15 的完整对局，因为你是在对局开始后的 12:01 进入的游戏。\n你没有完成从 12:30 到 12:45 的完整对局，因为你是在对局结束前的 12:44 退出的游戏。\n
\n\n

示例 2：

\n\n
\n输入：startTime = \"20:00\", finishTime = \"06:00\"\n输出：40\n解释：你完成了从 20:00 到 00:00 的 16 个完整的对局，以及从 00:00 到 06:00 的 24 个完整的对局。\n16 + 24 = 40\n
\n\n

示例 3：

\n\n
\n输入：startTime = \"00:00\", finishTime = \"23:59\"\n输出：95\n解释：除最后一个小时你只完成了 3 个完整对局外，其余每个小时均完成了 4 场完整对局。\n
\n\n

 

\n\n

提示：

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