class Problem0005:
    def solve(this):
        l = int(input())
        n = int(input())
        w = list(map(int, input().split()))
        w.sort()

        res = 0
        cnt = 0
        for i in range(0, len(w)):
            res += w[i]
            if res > l:
                break
            cnt += 1
        print(cnt)

if __name__ == "__main__":
    problem = Problem0005()
    problem.solve()