import pulp

W = []
L = int(input()) #箱の幅
N = int(input()) #ブロックの数
W = input().split() #各ブロックの幅

problem = pulp.LpProblem('No.5', pulp.LpMaximize) # 最大化する場合
xs = range(N)
x = pulp.LpVariable.dicts("x", (xs), 0, 1, pulp.LpInteger)
problem += pulp.lpSum([x[i]]for i in range(N))
problem += pulp.lpSum([int(W[i])*x[i]for i in range(N)]) <= L

problem.solve()
status = problem.solve()
count = 0
for i in range(N):
    count += x[i].value()
print(int(count))