#include <stdio.h>

int main(void){
    int N,M;
    scanf("%d %d",&N,&M);
    int a[110];
    int i;
    int sum=0;
    int c=0;
    for(i=1;i<N+1;i++){
        scanf("%d",&a[i]);
        
        sum+=a[i];
    }
    for(i=1;i<N+1;i++){
        if(a[i]>=sum/(4*M)){
            c+=1;
        }
    
    }
    if(c>=M){
        printf("Yes\n");
    }else{
        printf("No\n");
    }
    return 0;

}