function nonDecreasingSubsequence0(arr) {
  console.log(arr.filter((el, index) => el >= Math.max(...arr.slice(0, index))).join(' '))
}

nonDecreasingSubsequence1 = arr => {
  'use strict'

  let max = arr[0]
  let result = arr.filter(el => {
    if (el >= max) max = el

    return el >= max
  })

  console.log(result.join(' '))
}