"use strict";
function main(input) {
  let kari = input[0].trim().split(" ").map(i => parseInt(i));
  const n = kari[0];
  const m = kari[1];
  let a = input[1].trim().split(" ").map(i => parseInt(i));

  a.sort(function(a, b) {
    return b - a;
  });

  let sum = 0;
  for(let i=0;i<n;i++){
    sum += a[i];
  }

  let judge = false;
  for(let i=0;i<m;i++){
    if((sum/(4*m)) > a[i]){
      judge = true;
    }
  }

  console.log(judge?"No":"Yes");
}
main(require('fs').readFileSync('/dev/stdin', 'utf8').trim().split("\n"));