f = input()
L = int(f)
g = input()
N = int(g)
h = input()
s_h = h.split()
int_s_h = [int(v) for v in s_h]
sort = sorted(int_s_h)
a = 0
i = 0
while a + sort[i] <= L:
    a += sort[i]
    i += 1
    if i > N - 1:
        break
print(i)