#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
int main(void){
int n,m;
int a[105];
int sum=0;
int yes=0;
double summ;
scanf("%d %d",&n,&m);

for(int i=0;i<n;i++){
    scanf("%d",&a[i]);
    sum=sum+a[i];
}

summ=(double)sum/(4*m);

for(int i=0;i<n;i++){
    if((double)a[i]>=sum){yes++;}
}

if(yes>=m){printf("Yes\n");}
else{printf("No");}

}
