{ "data": { "question": { "questionId": "2620", "questionFrontendId": "2526", "categoryTitle": "Algorithms", "boundTopicId": 2046502, "title": "Find Consecutive Integers from a Data Stream", "titleSlug": "find-consecutive-integers-from-a-data-stream", "content": "
For a stream of integers, implement a data structure that checks if the last k integers parsed in the stream are equal to value.
Implement the DataStream class:
\n\nDataStream(int value, int k) Initializes the object with an empty integer stream and the two integers value and k.boolean consec(int num) Adds num to the stream of integers. Returns true if the last k integers are equal to value, and false otherwise. If there are less than k integers, the condition does not hold true, so returns false.\n
Example 1:
\n\n\nInput\n["DataStream", "consec", "consec", "consec", "consec"]\n[[4, 3], [4], [4], [4], [3]]\nOutput\n[null, false, false, true, false]\n\nExplanation\nDataStream dataStream = new DataStream(4, 3); //value = 4, k = 3 \ndataStream.consec(4); // Only 1 integer is parsed, so returns False. \ndataStream.consec(4); // Only 2 integers are parsed.\n // Since 2 is less than k, returns False. \ndataStream.consec(4); // The 3 integers parsed are all equal to value, so returns True. \ndataStream.consec(3); // The last k integers parsed in the stream are [4,4,3].\n // Since 3 is not equal to value, it returns False.\n\n\n
\n
Constraints:
\n\n1 <= value, num <= 1091 <= k <= 105105 calls will be made to consec.给你一个整数数据流,请你实现一个数据结构,检查数据流中最后 k 个整数是否 等于 给定值 value 。
请你实现 DataStream 类:
\n\nDataStream(int value, int k) 用两个整数 value 和 k 初始化一个空的整数数据流。boolean consec(int num) 将 num 添加到整数数据流。如果后 k 个整数都等于 value ,返回 true ,否则返回 false 。如果少于 k 个整数,条件不满足,所以也返回 false 。\n\n
示例 1:
\n\n\n输入:\n[\"DataStream\", \"consec\", \"consec\", \"consec\", \"consec\"]\n[[4, 3], [4], [4], [4], [3]]\n输出:\n[null, false, false, true, false]\n\n解释:\nDataStream dataStream = new DataStream(4, 3); // value = 4, k = 3 \ndataStream.consec(4); // 数据流中只有 1 个整数,所以返回 False 。\ndataStream.consec(4); // 数据流中只有 2 个整数\n // 由于 2 小于 k ,返回 False 。\ndataStream.consec(4); // 数据流最后 3 个整数都等于 value, 所以返回 True 。\ndataStream.consec(3); // 最后 k 个整数分别是 [4,4,3] 。\n // 由于 3 不等于 value ,返回 False 。\n\n\n
\n\n
提示:
\n\n1 <= value, num <= 1091 <= k <= 105consec 次数为 105 次。value.",
"Use a queue-type data structure to store the last k integers."
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