#include <stdio.h>

int main(void){

    int N = 0;
    int M = 0;
    int count = 0;
    int check = 0;
    scanf("%d %d", &N, &M);
    int A[N]; 

    check = N;

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

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

    if (M > check){
        printf("No\n");
    } else {
        printf("Yes\n");
    }
    return 0;
}