原文链接: https://leetcode-cn.com/problems/maximum-repeating-substring
英文原文
For a string sequence, a string word is k-repeating if word concatenated k times is a substring of sequence. The word's maximum k-repeating value is the highest value k where word is k-repeating in sequence. If word is not a substring of sequence, word's maximum k-repeating value is 0.
Given strings sequence and word, return the maximum k-repeating value of word in sequence.
Example 1:
Input: sequence = "ababc", word = "ab" Output: 2 Explanation: "abab" is a substring in "ababc".
Example 2:
Input: sequence = "ababc", word = "ba" Output: 1 Explanation: "ba" is a substring in "ababc". "baba" is not a substring in "ababc".
Example 3:
Input: sequence = "ababc", word = "ac" Output: 0 Explanation: "ac" is not a substring in "ababc".
Constraints:
1 <= sequence.length <= 1001 <= word.length <= 100sequenceandwordcontains only lowercase English letters.
中文题目
给你一个字符串 sequence ,如果字符串 word 连续重复 k 次形成的字符串是 sequence 的一个子字符串,那么单词 word 的 重复值为 k 。单词 word 的 最大重复值 是单词 word 在 sequence 中最大的重复值。如果 word 不是 sequence 的子串,那么重复值 k 为 0 。
给你一个字符串 sequence 和 word ,请你返回 最大重复值 k 。
示例 1:
输入:sequence = "ababc", word = "ab" 输出:2 解释:"abab" 是 "ababc" 的子字符串。
示例 2:
输入:sequence = "ababc", word = "ba" 输出:1 解释:"ba" 是 "ababc" 的子字符串,但 "baba" 不是 "ababc" 的子字符串。
示例 3:
输入:sequence = "ababc", word = "ac" 输出:0 解释:"ac" 不是 "ababc" 的子字符串。
提示:
1 <= sequence.length <= 1001 <= word.length <= 100sequence和word都只包含小写英文字母。
通过代码
高赞题解
解题思路
注意题目描述的是连续重复。
所以我们用StringBuilder拼接word
首先判断sequence是否包含word
如果包含则count++,然后sb再拼接一个word。
直至不包含为止退出循环。
count既是结果

代码
class Solution {
public int maxRepeating(String sequence, String word) {
int count = 0;
StringBuilder sb = new StringBuilder(word);
while(sequence.contains(sb)) {
count++;
sb.append(word);
}
return count;
}
}
统计信息
| 通过次数 | 提交次数 | AC比率 |
|---|---|---|
| 7363 | 16597 | 44.4% |
提交历史
| 提交时间 | 提交结果 | 执行时间 | 内存消耗 | 语言 |
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