T = int(input())
N = int(input())
t = [int(input()) for _ in range(N)]
 
INF = 10**18
dp = [[INF]*2 for _ in range(1 << N)]
dp[0] = [1, 0]

for S in range(1 << N):
    for i in range(N):
        if (S >> i) & 1:
            continue
        p = dp[S][:]
        if p[1] + t[i] <= T:
            p[1] += t[i]
        else:
            p[0] += 1
            p[1] = t[i]
        dp[S | (1 << i)] = min(dp[S | (1 << i)], p)
 
print(dp[(1 << N) - 1][0])