import sys
readline = sys.stdin.readline
l = int(readline())
n = int(readline())
def solve(W):
    W.sort()
    ans = []
    num = 0
    for i, j in enumerate(W):
        if num + j > l:
            break
        num += j
        ans.append(j)
    return len(ans)
W = [int(i) for i in readline().split(" ")]
print(solve(W))