'use strict';

const inputs = require('fs').readFileSync('/dev/stdin', 'utf8').split('\n');

const m = parseInt(inputs[0].split(' ')[1], 10);

const products = inputs[1].split(' ').map(v => parseInt(v, 10));

products.sort((a, b) => a - b).reverse();

const totalVotes = products.reduce((acc, cur) => cur + acc, 0);

for (let i = 0 ; i < m ; ++i) {
  if (products[i] < totalVotes / (4 * m)) {
    console.log('No');
    return;
  }
}

console.log('Yes');