#include<stdio.h>

int main(){
    int N,M;
    scanf("%d %d", &N, &M);
    int a[N];
    int i,j,ans = 0;
    double sum = 0;
    
    for(i = 0;i < N;i++){
        scanf("%d", &a[i]);
        sum += a[i];
    }
    for(i = 0;i < N;i++){
        if(a[i] >= sum / (4 * M))ans++;
    }
    if(ans >= M)printf("Yes");
    else printf("No");
    return 0;
}