#include <stdio.h>

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

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

        int select = 0, cnt = 0;

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