L = input()
N = input()
group = []

W = raw_input()

for i in range(0,N):
    split_W =W.split()
    a = int(split_W[i])
    group.append(a)    
group.sort()

for i in range(0,N+1):
    g = group[0:i]
    if sum(g) > L:
        print len(g[0:i])-1
        break