Phoenix and Bits

Description:

Input:

The first line contains two integers $$$n$$$ and $$$q$$$ ($$$1 \le n \le 2 \cdot 10^5$$$; $$$1 \le q \le 10^5$$$) — the number of integers and the number of queries, respectively.

The second line contains $$$n$$$ integers $$$a_1, a_2, \dots, a_n$$$ ($$$0 \le a_i < 2^{20}$$$) — the integers that Phoenix starts with.

The next $$$q$$$ lines contain the queries. For each query, the first integer of each line is $$$t$$$ ($$$1 \le t \le 4$$$) — the type of query.

If $$$t \in \{1, 2, 3\}$$$, then three integers $$$l_i$$$, $$$r_i$$$, and $$$x_i$$$ will follow ($$$0 \le l_i, r_i, x_i < 2^{20}$$$; $$$l_i \le r_i$$$).

Otherwise, if $$$t=4$$$, two integers $$$l_i$$$ and $$$r_i$$$ will follow ($$$0 \le l_i \le r_i < 2^{20}$$$).

It is guaranteed that there is at least one query where $$$t=4$$$.

Output:

Print the answer for each query where $$$t=4$$$.

Sample Input:

5 6
5 4 3 2 1
1 2 3 2
4 2 5
3 2 5 3
4 1 6
2 1 1 8
4 8 10

Sample Output:

3
2
1

Sample Input:

6 7
6 0 2 3 2 7
1 0 4 3
2 6 8 4
4 0 7
3 2 5 3
1 0 1 2
4 0 3
4 2 7

Sample Output:

5
1
2

Note:

In the first example:

• For the first query, $$$2$$$ is replaced by $$$2$$$ AND $$$2 = 2$$$ and $$$3$$$ is replaced with $$$3$$$ AND $$$2 = 2$$$. The set of numbers is $$$\{1, 2, 4, 5\}$$$.
• For the second query, there are $$$3$$$ distinct numbers between $$$2$$$ and $$$5$$$: $$$2$$$, $$$4$$$, and $$$5$$$.
• For the third query, $$$2$$$ is replaced by $$$2$$$ XOR $$$3 = 1$$$, $$$4$$$ is replaced by $$$4$$$ XOR $$$3 = 7$$$, and $$$5$$$ is replaced by $$$5$$$ XOR $$$3 = 6$$$. The set of numbers is $$$\{1, 6, 7\}$$$.
• For the fourth query, there are $$$2$$$ distinct numbers between $$$1$$$ and $$$6$$$: $$$1$$$ and $$$6$$$.
• For the fifth query, $$$1$$$ is replaced by $$$1$$$ OR $$$8 = 9$$$. The set of numbers is $$$\{6, 7, 9\}$$$.
• For the sixth query, there is one distinct number between $$$8$$$ and $$$10$$$: $$$9$$$.