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1668. Maximum Repeating Substring

Difficulty Topics

Description

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 <= 100
  • 1 <= word.length <= 100
  • sequence and word contains only lowercase English letters.

Solution

maximum-repeating-substring.py
class Solution:
    def maxRepeating(self, seq: str, w: str) -> int:

        res = 0
        s = set()
        times = len(seq) // len(w)
        p = [w * i for i in range(1, times+1)]

        for c in p:
            if c not in s and c in seq:
                s.add(c)
                res += 1

        return res