import sys

sys.setrecursionlimit(10 ** 6)
from bisect import *
from collections import *
from heapq import *


int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def MI(): return map(int, sys.stdin.readline().split())
def MI1(): return map(int1, sys.stdin.readline().split())
def MF(): return map(float, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LF(): return list(map(float, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
dij = [(0, 1), (1, 0), (0, -1), (-1, 0)]

def main():
    l=II()
    n=II()
    ww=LI()
    ww.sort()
    s=0
    for i,w in enumerate(ww):
        s+=w
        if s>l:
            print(i)
            exit()
    print(n)
    
main()