#include <stdio.h>
signed main(){
    int N,M,i,j,count=0,sum=0;
    scanf("%d %d",&N,&M);
    int A[100];
    for(i=0;i<N;i++){
        scanf("%d",&A[i]);
        sum+=A[i];
    }
    sum/=4*M;
    for(i=0;i<N;i++){
        if(A[i]>sum){
            count++;
        }
    }
    if(count>=M){
        printf("Yes\n");
    }else{
        printf("No\n");
    }
    return(0);
}