#include<stdio.h>

int main()
{
	int L,N,W[10000];
	int i,j,k;
	int tmp;
	int sum=0;
	int judge;
	
	scanf("%d",&L);
	scanf("%d",&N);
	for(i=0;i<N;++i){
		scanf("%d",&W[i]);
	}
	
	for(i=0;i<N;++i){
		for(j=i+1;j<N;++j){
			if(W[i]>W[j]){
				tmp=W[i];
				W[i]=W[j];
				W[j]=tmp;
			}
		}
	}
	
	for(k=0;judge>0;++k){
		sum=sum+W[k];
		judge=L-sum;
	}
	
	printf("%d",k-1);
	
	return 0;
}