"use strict";

const main = (input) => {
    const spi = input.split('\n');
    const [n, m] = spi[0].split(' ').map(e => Number(e));
    const a = spi[1].split(' ').map(e => Number(e));

    const sum = a.reduce((x, y) => x += y);
    let ans = 0;
    for (let i = 0; i < n; i++) {
        if (a[i] >= sum / (4 * m)) ans++;
    }
    
    if (ans >= m)
        console.log("Yes");
    else
        console.log("No");
};

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