#include<stdio.h>

int main(void){
    int N, M;
    scanf("%d %d",&N, &M);
    double A[N], number = 0,Sum = 0;
    for(int i = 0; i < N; i++){
        scanf("%lf",&A[i]);
        Sum += A[i];
    }
    for(int j= 0; j < N; j++){
        if(A[j] >= Sum /(4*M)){
            number++;
        }
    }
    if(number >= M){
        printf("Yes\n");
    }
    else{
        printf("No\n");
    }
    return 0;
}