l = int(input())
n = int(input())
w_list = list(map(int,input().split()))

sorted_w = sorted(w_list)
ever = 0
count = 0

for i in range(n):
    if ever + sorted_w[i] > l:
        break
    else:
        ever += sorted_w[i]
        count += 1
        
res = count

print(res)