{ "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.
00:15
, the fourth round starts at 00:45
, and the seventh round starts at 01:30
.You are given two strings loginTime
and logoutTime
where:
loginTime
is the time you will login to the game, andlogoutTime
is the time you will logout from the game.If logoutTime
is earlier than loginTime
, this means you have played from loginTime
to midnight and from midnight to logoutTime
.
Return the number of full chess rounds you have played in the tournament.
\n\nNote: 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
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\nloginTime
and logoutTime
are in the format hh:mm
.00 <= hh <= 23
00 <= mm <= 59
loginTime
and logoutTime
are not equal.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
。
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 。
startTime = \"05:20\"
且 finishTime = \"05:59\"
,这意味着你仅仅完成从 05:30
到 05:45
这一个完整对局。而你没有完成从 05:15
到 05:30
的完整对局,因为你是在对局开始后进入的游戏;同时,你也没有完成从 05:45
到 06:00
的完整对局,因为你是在对局结束前退出的游戏。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
)。
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
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:
\n\nstartTime
和 finishTime
的格式为 HH:MM
00 <= HH <= 23
00 <= MM <= 59
startTime
和 finishTime
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