#include<stdio.h>
#include<stdlib.h>



int main (void)
{
    int N,M,i;
    int A[100];
    int sum=0;
    int count=0;
    char c;


    scanf("%d %d",&N,&M);
    //scanf("%s",c);

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

    for(i=0;i<N;i++){
        if((int)(sum/4*M)<=A[i]){
            count++;
        }
    }

    if(count<M){
       printf("No");
    }else{
       printf("Yes");
    }


    return 0;

}
