#include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
double v;
int n,ans=0;
long int vi[1000005];
int main()
{
	freopen("jiahao1.in","r",stdin);
	freopen("jiahao1.out","w",stdout);
	scanf("%lf%d",&v,&n);
	for(int i=1;i<=n;i++)
	  scanf("%ld",&vi[i]);
	sort(vi+1,vi+n+1);
	for(int i=1;i<=n;i++){
		if(v>vi[i]){
			ans++;
			/*double ooo=(double)vi[i]/2;
			v+=ooo;*/
			v+=(double)vi[i]/2;
			//printf("%lf\n",v);
		}
		else break;
	}
	printf("%d",ans);
    fclose(stdin);
	fclose(stdout);
	return 0;
}