Consecutive Characters

Description

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 <= 500
• s contains only lowercase English letters.

Solution(javascript)

/**
 * @param {string} s
 * @return {number}
 */
const maxPower = function (s) {
  let count = 0
  let prevC = ''
  let max = 0
  for (const c of s) {
    if (c === prevC) {
      count += 1
    } else {
      prevC = c
      count = 1
    }
    max = Math.max(max, count)
  }
  return max
}