#include<stdio.h>

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