function Main(inputs) {
	const inputlines = inputs.split("\n");
  	const firstline = inputlines[0].split(" ");
  	const votevalues = inputlines[1].split(" ").map(x => parseInt(x, 10));
  	const standard = 1 / (4 * firstline[1]);
  	let yes = 0; 
  
    let totalvotes  = function(arr) {
    	let sum = 0;
    	arr.forEach(function(elm) {
        	sum += elm;
    	});
    	return sum;
	};
  
  	const currentstandard = totalvotes(votevalues) * standard;
  
  	for (let i = 0; i < votevalues.length; i++){
      	if(votevalues[i] >= currentstandard){
          	yes++;
          	if(yes == firstline[1]){
              	console.log("Yes");
              	break;
            }
        }
    }
  	if(yes != firstline[1]){
        console.log("No");
    }
}
 
Main(require("fs").readFileSync("/dev/stdin", "utf8"));