Given a string s, the power of the string is the maximum length of a non-empty substring that contains only one unique character.
Return the power of the string.
Example 1:
Input: s = "leetcode" Output: 2 Explanation: The substring "ee" is of length 2 with the character 'e' only.
Example 2:
Input: s = "abbcccddddeeeeedcba" Output: 5 Explanation: The substring "eeeee" is of length 5 with the character 'e' only.
Example 3:
Input: s = "triplepillooooow" Output: 5
Example 4:
Input: s = "hooraaaaaaaaaaay" Output: 11
Example 5:
Input: s = "tourist" Output: 1
Constraints:
1 <= s.length <= 500scontains only lowercase English letters.
Solution: Run length encoding?
Time complexity: O(n)
Space complexity: O(1)
C++
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// Author: Huahua class Solution { public: int maxPower(string s) { char p = '?'; int ans = 0; int cur = 0; for (char c : s) { if (c != p) cur = 0; p = c; ans = max(ans, ++cur); } return ans; } }; |
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