#include <stdio.h>

void sort(int *W, int N){
	int i, j, mem;
	for(i = 0; i < N; i++){
		for(j = 0; j < N-1; j++){
			if(W[i] < W[j]){
				mem = W[i];
				W[i] = W[j];
				W[j] = mem;
			}
		}
	}
}

int main(){
	int L, N, W[10001], i;
	scanf("%d %d", &L, &N);
	for(i = 0; i < N; i++)	scanf("%d", &W[i]);

	sort(W, N);
	i = 0;
	do{
		L -= W[i];
		i++;
	}while(L - W[i] >= 0 && W[i] != 0);

	printf("%d\n", i);
	return 0;
}