#include <stdio.h>

int main() {
    int s = 0, c = 0;

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

    for (int i = 0; i < N; i++) {
        if (s / (4 * M) <= A[i]) {
            c++;
        }
    }

    if (M <= c) {
        printf("Yes\n");
    } else {
        printf("No\n");
    }
    return 0;
}