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

int main(){
    int N,M;
    scanf("%d",&N);
    scanf("%d",&M);
    int A[N];
    double sum=0;
    for(int i=0;i<N;i++){
        scanf("%d",&A[i]);
        sum +=A[i];
    }
    int count=0;
    double B = 1.0/(4*M)*sum;

    for(int j=0;j<N;j++){
        if(A[j]>=B){
            count++;
        }

    }

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



    return 0;
}