#include <stdio.h>

int main() {
    int N,M;
    scanf("%d %d", &N, &M);

    int A[N];
    int total_votes=0;

    for (int i=0; i<=N-1; i++) {
        scanf("%d", &A[i]);
        total_votes+=A[i];
    }

    int min_votes=(total_votes)/(4*M);
    int select_item=0;
    for (int j=0; j<=N-1; j++) {
        if (A[j]>=min_votes)
            select_item++;
    }

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

    return 0;
}