L = int(input())
N = int(input())
W = list(map(int, input().split()))
temp = 0

list.sort(W)
if L > sum(W):
    print(N)
else:
    for i in range(N):
        temp += W[i]
        if temp > L:
            print(i)
            break
        elif temp == L:
            print(i+1)
            break