const main = (inputs) => {
  var array1 = inputs[0].split(" ");
  var array2 = inputs[1].split(" ");
  var N = array1[0];
  var M = array1[1];

  var sum = 0;
  array2.forEach((elm) => {
    sum += elm - 0;
  });

  var NGValue = sum / (4 * M);

  var sortArray = array2.filter(v => {
    return Number(v) >= Number(NGValue);
  });
  if (sortArray.length >= M && N > 0 && M > 0) {
    console.log('Yes');
  } else {
    console.log('No');
  }
}
main(require('fs').readFileSync('/dev/stdin', 'UTF-8').trim().split("\n"));