#include <stdio.h>

int main(void)
{
    int N, M;
    int A[1000];
    int i;
    int totalPoints = 0;
    double limitPoint;
    int check = 0;
    // input
    scanf("%d %d", &N, &M);
    for (i = 0; i < N; i++) {
        scanf("%d", &A[i]);
    }

    // 総得票数
    for (i = 0; i < N; i++) {
        totalPoints += A[i];
    }
    // 得票数が規定を満たす商品の数
    limitPoint = (double)totalPoints / 4.0 / (double)M;

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

    return 0;
}