import sys
input = sys.stdin.buffer.readline
sys.setrecursionlimit(10 ** 7)

T = int(input())
N = int(input())
A = [int(input()) for _ in range(N)]

dp = [N] * (1 << N)
dp[0] = 0
for S in range(1, 1 << N):
    time = 0
    for i, t in enumerate(A):
        if (S >> i) & 1:
            time += t
    if time <= T:
        dp[S] = 1

for S in range(1, 1 << N):
    T = S
    while T:
        dp[S] = min(dp[S], dp[T] + dp[S ^ T])
        T = (T - 1) & S
print(dp[(1 << N)-1])