import sys

input = sys.stdin.readline


def main():
    L = int(input())
    N = int(input())
    *W, = map(int, input().split())
    W.sort()

    ans = 0
    for i in W:
        if L >= i:
            L -= i
            ans += 1
        else:
            break
    print(ans)


if __name__ == '__main__':
    main()