function Main(input) {
	var str = input;
	var sum = 0;
	var c = 0;
	var poll = [];
	str = str.split("\n");
	var n = Number(str[0].split(" ")[1]);
	str = str[1].split(" ");
	for (var k= 0; k < str.length; k++){
 		poll[k] = Number(str[k]);
 	}
//  	console.log(poll);
 	for (var i = 0; i < poll.length; i++){
 		sum = sum+ poll[i];
 	}
 	var m = Math.ceil(sum/(4*n));
 	for (var j = 0; j < poll.length; j++){
 		if(poll[j] >= m){
 			c++;
 		}
 	}
 	if(c>=n){
	 console.log("Yes");
	 }else{
	 console.log("No");
	 }
}
 //*おまじない
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
