#include<stdio.h>

int main()
{
    int N, M;
    int A[100];
    int all;
    double border;
    int count;
    int i;

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

    all = 0;
    for (i=0;i<N;i++){
        all += A[i];
    }

    border = all / (4*M);

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

    if (count>=M) {
        printf("Yes");
    }    
    else {
        printf("No");
    }
    return 0;
}