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Uh984O.json
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{
"data": {
"question": {
"questionId": "1000138",
"questionFrontendId": "LCP 25",
"categoryTitle": "Algorithms",
"boundTopicId": 393241,
"title": "古董键盘",
"titleSlug": "Uh984O",
"content": "",
"translatedTitle": "古董键盘",
"translatedContent": "小扣在秋日市集购买了一个古董键盘。由于古董键盘年久失修，键盘上只有 26 个字母 **a~z** 可以按下，且每个字母最多仅能被按 `k` 次。\n\n小扣随机按了 `n` 次按键，请返回小扣总共有可能按出多少种内容。由于数字较大，最终答案需要对 1000000007 (1e9 + 7) 取模。\n\n\n**示例 1：**\n>输入：`k = 1, n = 1`\n> \n>输出：`26`\n> \n>解释：由于只能按一次按键，所有可能的字符串为 \"a\", \"b\", ... \"z\" \n\n**示例 2：**\n>输入：`k = 1, n = 2`\n> \n>输出：`650`\n> \n>解释：由于只能按两次按键，且每个键最多只能按一次，所有可能的字符串（按字典序排序）为 \"ab\", \"ac\", ... \"zy\" \n\n**提示：**\n- `1 <= k <= 5`\n- `1 <= n <= 26*k`\n \n\n",
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"difficulty": "Hard",
"likes": 29,
"dislikes": 0,
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{
"username": "LeetCode",
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{
"name": "Math",
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"translatedName": "数学",
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{
"name": "Dynamic Programming",
"slug": "dynamic-programming",
"translatedName": "动态规划",
"__typename": "TopicTagNode"
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"name": "Combinatorics",
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"__typename": "TopicTagNode"
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{
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"langSlug": "cpp",
"code": "class Solution {\npublic:\n int keyboard(int k, int n) {\n\n }\n};",
"__typename": "CodeSnippetNode"
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{
"lang": "Java",
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"code": "class Solution {\n public int keyboard(int k, int n) {\n\n }\n}",
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{
"lang": "Python",
"langSlug": "python",
"code": "class Solution(object):\n def keyboard(self, k, n):\n \"\"\"\n :type k: int\n :type n: int\n :rtype: int\n \"\"\"",
"__typename": "CodeSnippetNode"
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{
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"langSlug": "python3",
"code": "class Solution:\n def keyboard(self, k: int, n: int) -> int:",
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"code": "public class Solution {\n public int Keyboard(int k, int n) {\n\n }\n}",
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{
"lang": "JavaScript",
"langSlug": "javascript",
"code": "/**\n * @param {number} k\n * @param {number} n\n * @return {number}\n */\nvar keyboard = function(k, n) {\n\n};",
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"code": "class Solution {\n fun keyboard(k: Int, n: Int): Int {\n\n }\n}",
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{
"lang": "PHP",
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{
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"stats": "{\"totalAccepted\": \"1.5K\", \"totalSubmission\": \"4K\", \"totalAcceptedRaw\": 1452, \"totalSubmissionRaw\": 4035, \"acRate\": \"36.0%\"}",
"hints": [],
"solution": null,
"status": null,
"sampleTestCase": "1\n1",
"metaData": "{\"name\": \"keyboard\", \"params\": [{\"name\": \"k\", \"type\": \"integer\"}, {\"name\": \"n\", \"type\": \"integer\"}], \"return\": {\"type\": \"integer\"}}",
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