l = int(input())
n = int(input())
w = sorted(map(int, input().split()))
sum = 0
for i in range(n):
    sum = sum + w[i]
    if sum > l:
        i_count = i
        break
    if sum == l:
        i_count = i + 1 
        break    
    if i_count == 0:
        i_count = n

print(i_count)