function Main(input) {
  var tmp = input.trim().split('\n')
  //var N = tmp[0].split(' ')[0]
  var M = tmp[0].split(' ')[1]
  var A = tmp[1].split(' ')

  var voteCount = 0

  for (var i = 0; i < A.length; i++) {
    voteCount += parseInt(A[i])
  }

  var limit = 1 / (4 * M) * voteCount

  var choiceNum = 0
  for (var j = 0; j < limit; j++) {
    if (A[j] > limit) {
      choiceNum += 1
    }
  }

  var result = ''

  if (choiceNum > M) {
    result = 'Yes'
  } else {
    result = 'No'
  }

  console.log(result)
  return result
}

Main(require('fs').readFileSync('/dev/stdin', 'utf8'))