{ "data": { "question": { "questionId": "1689", "questionFrontendId": "1566", "categoryTitle": "Algorithms", "boundTopicId": 390483, "title": "Detect Pattern of Length M Repeated K or More Times", "titleSlug": "detect-pattern-of-length-m-repeated-k-or-more-times", "content": "
Given an array of positive integers arr
, find a pattern of length m
that is repeated k
or more times.
A pattern is a subarray (consecutive sub-sequence) that consists of one or more values, repeated multiple times consecutively without overlapping. A pattern is defined by its length and the number of repetitions.
\n\nReturn true
if there exists a pattern of length m
that is repeated k
or more times, otherwise return false
.
\n
Example 1:
\n\n\nInput: arr = [1,2,4,4,4,4], m = 1, k = 3\nOutput: true\nExplanation: The pattern (4) of length 1 is repeated 4 consecutive times. Notice that pattern can be repeated k or more times but not less.\n\n\n
Example 2:
\n\n\nInput: arr = [1,2,1,2,1,1,1,3], m = 2, k = 2\nOutput: true\nExplanation: The pattern (1,2) of length 2 is repeated 2 consecutive times. Another valid pattern (2,1) is also repeated 2 times.\n\n\n
Example 3:
\n\n\nInput: arr = [1,2,1,2,1,3], m = 2, k = 3\nOutput: false\nExplanation: The pattern (1,2) is of length 2 but is repeated only 2 times. There is no pattern of length 2 that is repeated 3 or more times.\n\n\n
\n
Constraints:
\n\n2 <= arr.length <= 100
1 <= arr[i] <= 100
1 <= m <= 100
2 <= k <= 100
给你一个正整数数组 arr
,请你找出一个长度为 m
且在数组中至少重复 k
次的模式。
模式 是由一个或多个值组成的子数组(连续的子序列),连续 重复多次但 不重叠 。 模式由其长度和重复次数定义。
\n\n如果数组中存在至少重复 k
次且长度为 m
的模式,则返回 true
,否则返回 false
。
\n\n
示例 1:
\n\n输入:arr = [1,2,4,4,4,4], m = 1, k = 3\n输出:true\n解释:模式 (4) 的长度为 1 ,且连续重复 4 次。注意,模式可以重复 k 次或更多次,但不能少于 k 次。\n\n\n
示例 2:
\n\n输入:arr = [1,2,1,2,1,1,1,3], m = 2, k = 2\n输出:true\n解释:模式 (1,2) 长度为 2 ,且连续重复 2 次。另一个符合题意的模式是 (2,1) ,同样重复 2 次。\n\n\n
示例 3:
\n\n输入:arr = [1,2,1,2,1,3], m = 2, k = 3\n输出:false\n解释:模式 (1,2) 长度为 2 ,但是只连续重复 2 次。不存在长度为 2 且至少重复 3 次的模式。\n\n\n
示例 4:
\n\n输入:arr = [1,2,3,1,2], m = 2, k = 2\n输出:false\n解释:模式 (1,2) 出现 2 次但并不连续,所以不能算作连续重复 2 次。\n\n\n
示例 5:
\n\n输入:arr = [2,2,2,2], m = 2, k = 3\n输出:false\n解释:长度为 2 的模式只有 (2,2) ,但是只连续重复 2 次。注意,不能计算重叠的重复次数。\n\n\n
\n\n
提示:
\n\n2 <= arr.length <= 100
1 <= arr[i] <= 100
1 <= m <= 100
2 <= k <= 100
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