2566.js

/** ------------------------------------------------------------------------------
 * 
 * 2566. Maximum Difference by Remapping a Digit
 * Topics: Greedy
 * https://leetcode.com/problems/maximum-difference-by-remapping-a-digit/description/?envType=daily-question&envId=2025-06-14
 * 
 ------------------------------------------------------------------------------ */
/**
 * @param {number} num
 * @return {number}
 */
var minMaxDifference = function (num) {
  let arr = num.toString().split("")
  let nonNine = arr.find((a) => a !== "9")
  let nonZero = arr.find((a) => a !== "0")
  let max = arr.map((a) => {
    if (nonNine === a) {
      return "9"
    } else {
      return a
    }
  })

  let min = arr.map((a) => {
    if (nonZero === a) {
      return "0"
    } else {
      return a
    }
  })

  return Number(max.join("")) - Number(min.join(""))
}

console.log(console.log(minMaxDifference(11891)))