#include<stdio.h>
int main(void){
    int i, j, N, M;
    int all = 0;
    j = 0;
    scanf("%d %d",&N,&M);
    int A[N];
    for(i=0; i<=N-1; i++){
        scanf("%d",&A[i]);
        all += A[i];
    }
    all = all/(4*M);
    for(i=0; i<=N-1; i++){
        if(A[i] >= all){
            j++;
        }
    }
    if(j >= M){
        printf("Yes\n");
    }else{
        printf("No\n");
    }

    return 0;
}