#include <stdio.h>

int main(void)
{
    int N, M;
    int A[100];
    int i;
    int totalPoint = 0;
    double passPoint;
    int count = 0;
    // input
    scanf("%d %d", &N, &M);

    for (i = 0; i < N; i++) {
        scanf("%d", &A[i]);
        totalPoint += A[i];
    }
    // printf("totalpoint: %d\n", totalPoint);

    // 合格点
    passPoint = (double)totalPoint / (double)(4 * M);

    // printf("passPoint: %f\n", passPoint);

    for (i = 0; i < N; i++) {
        if ((double)(A[i]) >= passPoint) {
            count += 1;
        }
    }
    
    // output
    if(count >= M) {
        printf("Yes\n");
    } else {
        printf("No\n");
    }

    return 0;
}