function Main (input) {
  input = input.split("\n").map(inp => inp.split(" ").map(Number));
  var N = input[0][0];
  var M = input[0][1];
  var A = input[1];
  var st = 0;
  for (var i of A) {
    st += i;
  }
  var ans = "No";
  var n_nk = 0;
  for (var i of A) {
    if (i >= st/(4*M)) {
      n_nk++;
    }
    if (n_nk >= M) {
      ans = "Yes";
      break;
    }
  }
  console.log(ans);
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));