/*
 * FileName:     B
 * CreatedDate:  2020-04-04 20:59:50 +0900
 * LastModified: 2020-04-04 21:46:11 +0900
 */

#include <stdio.h>

int main(void){
    int N,M;
    scanf("%d %d",&N,&M);
    int A[N];
    int total=0;
    for( int i=0; i<N; i++){
        scanf("%d", &A[i]);
        total+=A[i];
    }
    float pro = (float)total*(float)1/(4*M);
    int count=0;
    for(int i=0;i<N;i++){
        if(pro<(int)A[i]){
            count++;
        }
    }
//    printf("%d\n",count);
    if(count>=M){
        printf("Yes\n");
    }
    else{
        printf("No\n");
    }
    return 0;
}
