function Main(input) {
    var N = parseInt(input[0], 10);
    var M = parseInt(input[1], 10);
    var A = input.slice(2).map(i => parseInt(i, 10));

    var sum = 0;

    for (var i = 0; i < N; i++) {
        sum += A[i];
    }
    
    var min = sum / (4 * M);
    var result = 0;

    for (var i = 0; i < N; i++) {
        if (A[i] >= min) {
            result++;
        }
    }

    console.log(result >= M ? 'Yes' : 'No');
}

Main(require("fs").readFileSync("/dev/stdin", "utf8").trim().split(/\n|\s/));