T = int(input())
N = int(input())
t = [0] * N
for i in range(N):
    t[i] = int(input())

inf = 10 ** 18
N2 = 1 << N
dp = [inf] * N2
for s in range(1, N2):
    v = 0
    for i in range(N):
        if (s >> i) & 1:
            v += t[i]
    if v <= T:
        dp[s] = 1
        continue
    sub = s
    while sub:
        nokori = s ^ sub
        dp[s] = min(dp[s], dp[sub] + dp[nokori])
        sub = (sub - 1) & s

print(dp[-1])