import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
sys.setrecursionlimit(10 ** 7)

l = int(readline())
n = int(readline())
a = sorted(list(map(int, read().split())))
for i in range(n):
    if l < sum(a[:i + 1]):
        print(i)
        exit()
print(n)