#include<stdio.h>

int main(void) {
	int width, number, tmp, goukei, count;

	goukei = 0;
	count = 0;

	scanf("%d", &width);
	scanf("%d", &number);

	int haba[number];

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

	//数値を昇順にソート
	for (int i = 0; i < number; ++i) {
		for (int j = i + 1; j < number; ++j) {
			if (haba[i] > haba[j]) {
				tmp = haba[i];
				haba[i] = haba[j];
				haba[j] = tmp;
			}
		}
	}

	for (int i = 0; i < number; i++) {
		if (width >= 0) {
			width = width - haba[i];
			if (width <= 0) {
				break;
			}else{
				count++;
			}
		} else {
			break;
		}
	}

	printf("%d", count);

}