function Main(input){
	input = input.split("\n");
	var mem = input[0].split(" ").map(Number);
	var arr = input[1].split(" ").map(Number);
	var sum = arrsum(arr);
	var n = sum/4/mem[1];
	var ans = 0
	for(var i=0;i<arr.length;i++){
		if(arr[i]>=n) ans++;
	}
	console.log(ans>=mem[1]?"Yes":"No")
}Main(require("fs").readFileSync("/dev/stdin", "utf8").trim());
function arrsum(arr){
    var sum = 0;
    for (var i=0,len=arr.length; i<len; ++i) {
        sum += arr[i]-0;
    }
    return sum;
}