'use strict';

function _createForOfIteratorHelper(o) { if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (o = _unsupportedIterableToArray(o))) { var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var it, normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

var Main = function Main(input) {
  var row_list = input.split('\n');
  var row0_sp = row_list[0].split(' ');
  var items = row_list[1].split(' ').map(function (item) {
    return Number(item);
  });
  var N = row0_sp[0];
  var M = row0_sp[1];
  items.sort(function (a, b) {
    return b - a;
  });
  var sum = 0;

  var _iterator = _createForOfIteratorHelper(items),
      _step;

  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      var item = _step.value;
      sum += item;
    }
  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }

  var border = sum * (1 / (4 * M + 1));
  var canSelect = true;

  for (var i = 0; i < M; i++) {
    if (items[i] < border) {
      canSelect = false;
      break;
    }
  }

  console.log(canSelect ? 'Yes' : 'No');
};

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