#include <stdio.h>

int main(){
	
	int N,M;
	scanf("%d %d", &N, &M);
	int A[100];
	int total = 0, selected = 0;
	for(int i = 0; i < N; i++){
		scanf("%d", &A[i]);
		total += A[i];
	}
	
	for(int i = 0; i < N; i++){
		if( A[i] >= total/(4*M) ){
			selected++;
		}
		if ( selected == M ){
			printf("Yes"); break;
		}
		/*if( N-i-1 < M-selected ){
			printf("No"); break;
		}*/
	}
	
	if( selected < M ){
		printf("No");
	}
}