#include <stdio.h>

void Quicksort(int data[], int left, int right){
    int l = left, r = right;
    int pivot = data[(left + right) / 2];
    int temp;

    while(1){
        while (data[l] < pivot) l++;
        while (pivot < data[r]) r--;
        if(r < l) break;

        temp = data[l];
        data[l] = data[r];
        data[r] = temp;

        l++, r--;
    }
    if(left < r)  Quicksort(data, left, r);
    if(l < right) Quicksort(data, l, right);
}

int main(void){
	int i, L, N;
	scanf("%d %d", &L, &N);

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

	Quicksort(W, 0, N-1);

	i = 0;
	int sum = 0;
	while(1){
		sum += W[i];
		if (sum>L){
			printf("%d\n", i);
			break;
		}
		i++;
	}
	return 0;
}