process.stdin.resume();
process.stdin.setEncoding('utf8');
var input_string = '';

process.stdin.on('data', function (chunk) {
    input_string += chunk;
    var lines = input_string.split("\n");
    if (lines.length % 2 == 1) {
        const p = lines[lines.length-1].split(' ');
        const n = p[0];
        const m = p[1];
        const c = []
        c.push(lines[lines.length].split(' ').map(value => parseInt(value)));
        var x = 0;
        var y = 0;
        for (var j = 0; j < n; j++) {
            y += c[0][j];
        }
        for (var i = 0; i < n; i++) {
            if (c[0][i] > (y / (4 * m))) {
                x += 1;
            }
        }
        if (x >= m) {
            console.log("Yes");
        }else {
            console.log("No");
        }
    }
});



