function main(input) {
  const [n, m] = input[0].split(' ').map((n) => parseInt(n));
  const A = input[1].split(' ').map((n) => parseInt(n));
  const A_sum = A.reduce((a, x) => a + x);
  const ans = A.filter((a) => a > A_sum / 4 / m).length >= m;
  console.log(ans ? 'Yes' : 'No');
}
main(require('fs').readFileSync('/dev/stdin', 'utf8').split('\n'));