#include <stdio.h>

int main(void){
    int N, M, a[100];
    long long sum_votes, border;
    int count, i;
    sum_votes = 0;
    count = 0;

    scanf("%d%d", &N, &M);
    for(i = 0; i < N; i++){
        scanf("%d", &a[i]);
        sum_votes += a[i];
    }
    border = sum_votes / (4.0 * M);

    for(i = 0; i < N; i++){
        if(a[i] >= border)
            count++;
    }

    if(count >= M)
        printf("Yes\n");
    else
        printf("No\n");

    return 0;
}