list1 = []
L=int(input())
N=int(input())
W_list=list(map(int, input().split()))

W_list.sort()

for i in range(N):
    list1.append(W_list[i])
    W = sum(list1)
    if W <= L:
        continue
    else:
        break
if i != N:
    print(i)
else:
    print(i+1)