#include <stdio.h>

int main() {

    int N;
    int M;
    int A[N];
    int sum;
    int i;
    double threshold;
    int count;

    sum = 0;
    count = 0;
    
    scanf("%d %d", &N, &M);

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

    threshold = sum / (4 * M);

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

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

    return 0;

}