"use strict";

const main = arg => {
    const input = arg.trim().split("\n");

    const N = Number(input[0].split(" ")[0]);
    const M = Number(input[0].split(" ")[1]);
    const A = input[1].split(" ").map(n => Number(n));
    const total = A.reduce((acc, curr) => acc+curr)
    const thresh = 1*total / (4*M)
    A.sort((a,b) => b-a)
    if(A[M-1] >= thresh) console.log("No")
    else console.log("Yes")
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));  
