max = int(input())
num = int(input())
a = [input() for i in range(max)]
a = a.sort()
total[0] = a[0]
for i in range(a):
    total[i + 1] = total[i] + a[i + 1]

if max > total[0]:
    print('0')
elif max == total[0]:
    print('1')
elif max < total[i]:
    print(i)