import math
import sys
def S(): return sys.stdin.readline().rstrip()
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int, sys.stdin.readline().rstrip().split())
def LI(): return list(map(int, sys.stdin.readline().rstrip().split()))
def LS(): return list(sys.stdin.readline().rstrip().split())

L = I()
N = I()
W = LI()

W.sort()
s = 0
for i in range(N):
    s += W[i]
    if s > L:
        print(i)
        break
else:
    print(N)