"use strict";
    
const main = arg => {
    arg = arg.trim().split("\n");
    const N = parseInt(arg[0].split(" ")[0]);
    const M = parseInt(arg[0].split(" ")[1]);
    const A = arg[1].split(" ").map(Number);
    
    let sum = A.reduce((m,n)=>m+n);
    let popular = 0;
    
    for(let i in A) {
        const limit = sum * (1 / (4 * M));
        
        if(A[i] >= limit) {
            popular++;
        }
    }

    console.log(popular >= M ? "Yes" : "No");
}
main(require('fs').readFileSync('/dev/stdin', 'utf8'));