L = int(input())
N = int(input())
W = list(map(int, input().split()))
ww = []


while True:
    if W != []:
        w = min(W)
        W.remove(w)
        ww.append(w)
    else:
        break
    if sum(ww) <= L:
        continue
    else:
        break
    
print(len(ww)-1)