'use strict';
function main(input) {
  const arr = input.trim().split('\\n').map(x => Number(x));
  const a = arr[0].split(' ');
  const b = arr[1].split(' ').sort(function (a, b) {
    return b - a;
  });
  let sum = 0;

  for (let i = 0; i < b.length; i ++) {
    sum += b[i];
  }

  if (b[(a[1] - 1)] < sum / 4 / a[1]) {
    console.log('No');
  } else {
    console.log('Yes');
  }
  
}

main(require("fs").readFileSync("/dev/stdin", "utf8"));
