1957.js

/** ------------------------------------------------------------------------------
 * 
 * 1957. Delete Characters to Make Fancy String
 * Topics: String
 * https://leetcode.com/problems/delete-characters-to-make-fancy-string/?envType=daily-question&envId=2024-11-01
 * 
 ------------------------------------------------------------------------------ */
/**
 * @param {string} s
 * @return {string}
 */
var makeFancyString = function (s) {
  let count = 1
  let prev = s[0]
  let answer = s[0]

  for (let i = 1; i < s.length; i++) {
    const w = s[i]

    if (prev !== w) {
      count = 1
      prev = w
      answer += w
      continue
    }

    if (prev === w && count < 2) {
      answer += w
      count++
      continue
    }

    if (prev === w && count === 2) {
      continue
    }
  }

  return answer
}