mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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168 lines
16 KiB
JSON
168 lines
16 KiB
JSON
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"questionId": "401",
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"title": "Binary Watch",
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"titleSlug": "binary-watch",
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"content": "<p>A binary watch has 4 LEDs on the top which represent the hours (0-11), and the 6 LEDs on the bottom represent the minutes (0-59). Each LED represents a zero or one, with the least significant bit on the right.</p>\n\n<ul>\n\t<li>For example, the below binary watch reads <code>"4:51"</code>.</li>\n</ul>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/04/08/binarywatch.jpg\" style=\"width: 500px; height: 500px;\" /></p>\n\n<p>Given an integer <code>turnedOn</code> which represents the number of LEDs that are currently on, return <em>all possible times the watch could represent</em>. You may return the answer in <strong>any order</strong>.</p>\n\n<p>The hour must not contain a leading zero.</p>\n\n<ul>\n\t<li>For example, <code>"01:00"</code> is not valid. It should be <code>"1:00"</code>.</li>\n</ul>\n\n<p>The minute must be consist of two digits and may contain a leading zero.</p>\n\n<ul>\n\t<li>For example, <code>"10:2"</code> is not valid. It should be <code>"10:02"</code>.</li>\n</ul>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n<pre><strong>Input:</strong> turnedOn = 1\n<strong>Output:</strong> [\"0:01\",\"0:02\",\"0:04\",\"0:08\",\"0:16\",\"0:32\",\"1:00\",\"2:00\",\"4:00\",\"8:00\"]\n</pre><p><strong>Example 2:</strong></p>\n<pre><strong>Input:</strong> turnedOn = 9\n<strong>Output:</strong> []\n</pre>\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>0 <= turnedOn <= 10</code></li>\n</ul>\n",
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"difficulty": "Easy",
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"likes": 936,
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"exampleTestcases": "1\n9",
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"categoryTitle": "Algorithms",
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"name": "Backtracking",
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"name": "Bit Manipulation",
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"lang": "C++",
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"langSlug": "cpp",
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"code": "class Solution {\npublic:\n vector<string> readBinaryWatch(int turnedOn) {\n \n }\n};",
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"langSlug": "java",
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"code": "class Solution {\n public List<String> readBinaryWatch(int turnedOn) {\n \n }\n}",
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"code": "class Solution(object):\n def readBinaryWatch(self, turnedOn):\n \"\"\"\n :type turnedOn: int\n :rtype: List[str]\n \"\"\"\n ",
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"code": "class Solution:\n def readBinaryWatch(self, turnedOn: int) -> List[str]:\n ",
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"code": "\n\n/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nchar ** readBinaryWatch(int turnedOn, int* returnSize){\n\n}",
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"code": "public class Solution {\n public IList<string> ReadBinaryWatch(int turnedOn) {\n \n }\n}",
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"code": "/**\n * @param {number} turnedOn\n * @return {string[]}\n */\nvar readBinaryWatch = function(turnedOn) {\n \n};",
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"lang": "Ruby",
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"langSlug": "ruby",
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"code": "# @param {Integer} turned_on\n# @return {String[]}\ndef read_binary_watch(turned_on)\n \nend",
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"code": "class Solution {\n func readBinaryWatch(_ turnedOn: Int) -> [String] {\n \n }\n}",
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"code": "func readBinaryWatch(turnedOn int) []string {\n \n}",
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"code": "object Solution {\n def readBinaryWatch(turnedOn: Int): List[String] = {\n \n }\n}",
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"code": "class Solution {\n fun readBinaryWatch(turnedOn: Int): List<String> {\n \n }\n}",
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"code": "impl Solution {\n pub fn read_binary_watch(turned_on: i32) -> Vec<String> {\n \n }\n}",
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"code": "class Solution {\n\n /**\n * @param Integer $turnedOn\n * @return String[]\n */\n function readBinaryWatch($turnedOn) {\n \n }\n}",
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"code": "function readBinaryWatch(turnedOn: number): string[] {\n\n};",
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"code": "(define/contract (read-binary-watch turnedOn)\n (-> exact-integer? (listof string?))\n\n )",
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"lang": "Erlang",
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"langSlug": "erlang",
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"code": "-spec read_binary_watch(TurnedOn :: integer()) -> [unicode:unicode_binary()].\nread_binary_watch(TurnedOn) ->\n .",
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"langSlug": "elixir",
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"code": "defmodule Solution do\n @spec read_binary_watch(turned_on :: integer) :: [String.t]\n def read_binary_watch(turned_on) do\n\n end\nend",
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"hints": [
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"Simplify by seeking for solutions that involve comparing bit counts.",
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"Consider calculating all possible times for comparison purposes."
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],
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"solution": null,
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"status": null,
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"sampleTestCase": "1",
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"metaData": "{\n \"name\": \"readBinaryWatch\",\n \"params\": [\n {\n \"name\": \"turnedOn\",\n \"type\": \"integer\"\n }\n ],\n \"return\": {\n \"type\": \"list<string>\"\n }\n}",
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