#!/usr/bin/env python3
# %%
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines


# %%
T, N, *A = map(int, read().split())

# %%
INF = 10 ** 9
dp = [INF] * (1 << N)
dp[0] = 0
for subset in range(1 << N):
    for i, x in enumerate(A):
        if subset & (1 << i):
            t = dp[subset ^ (1 << i)]
            q, r = divmod(t, T)
            if r + x <= T:
                t += x
            else:
                t = (q + 1) * T + x
            if dp[subset] > t:
                dp[subset] = t


# %%
answer = (dp[-1] + T - 1) // T
print(answer)