import sys

sys.setrecursionlimit(10 ** 6)

def main():
    l = int(input())
    n = int(input())
    ww = list(map(int, input().split()))
    ww.sort()
    s = 0
    cnt = 0
    for w in ww:
        s += w
        cnt += 1
        if s > l: break
    else:
        cnt += 1
    print(cnt - 1)

main()