#include <stdio.h>
#include <stdlib.h>

int main(){
    int n,m;
    int score = 0;;
    int b[100];
    int sum = 0;
    int lim = 0;
    scanf("%d %d",&n,&m);
    for(int i = 0;i < 100;i++){
        b[i] = 0;
        scanf("%d",&b[i]);
        sum += b[i];
    }
    lim = (sum + (4 * m) - 1) / (4 * m);

    for(int i= 0;i < 100;i++){
        if(b[i] >= lim){
            score++;
        }
    }

    if(score >= m){
        printf("Yes");
    }else{
        printf("No");
    }
    return 0;
}
