#include <stdio.h>

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

    scanf("%d%d", &N, &M);
    for(i = 0; i < N; i++){
        scanf("%d", &votes[i]);
        sum_votes += votes[i];
    }

    for(i = 0; i < N; i++){
        if(votes[i] >= (sum_votes/(4.0*M)))
            count++;
    }
    
    if(count >= M)
        printf("Yes\n");
    else
        printf("No\n");

    return 0;
}
