#include <stdio.h>

int main(void) {
        int n, m, i;
        scanf("%d %d",&n,&m);

        int A[n];
        for (i=0;i<n;i++) scanf("%d",&A[i]);

        int lim, select, sum, cnt;

        sum = lim = select = cnt = 0;
        for (i=0;i<n;i++)       sum += A[i];
        lim = sum / (4 * m);
        for (i=0;i<n;i++) {
                if(A[i]>lim) cnt++;
                if(cnt == m) {
                        select = 1;
                        break;
                }
        }
        if(select) printf("Yes\n");
        else printf("No\n");
        return 0;
}