#include <stdio.h>

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

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

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