s = [input() for i in range(3)]
L = int(s[0])
N = int(s[1])
W = [int(i) for i in s[2].split()]

W.sort()
    
i = 0
while L - W[i] >= 0:
    L -= W[i]
    i += 1

    if i == N:
        break

print(i)