#include<stdio.h>

int main(void){
	int l,n,i,j,tmp;
	int wi[10000];
	
	scanf("%d%d",&l,&n);
	for(i=0;i<n;i++){
		scanf("%d",&wi[i]);
	}
	
	for(i=0;i<n-1;i++){
		for(j=n-1;j>=i;j--){
			if(wi[j] < wi[j-1]){
				tmp = wi[j];
				wi[j] = wi[j-1];
				wi[j-1] = tmp;
			}
		}
	}
	i=0;
	while(1){
		l-=wi[i];
		if(l<0) break;
		i++;
		if(i == n) break;
	}
	printf("%d\n",i);
	
	return 0;
}