Anonymity Is Important

Description:

Input:

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

In each of the next $$$q$$$ lines, the description of the query is given. The first number in the line is $$$t$$$ ($$$t = 0$$$ or $$$t = 1$$$) — the type of the query.

If $$$t = 0$$$, the line contains three more integers $$$l, r, x$$$ ($$$1 \le l \le r \le n$$$, $$$x = 0$$$ or $$$x = 1$$$). This query means that Sam tells that among the people in the queue from $$$l$$$-th to $$$r$$$-th (inclusive):

• there was at least one sick person, if $$$x=1$$$,
• there is no sick people, if $$$x=0$$$.

If $$$t = 1$$$, the line contains one more integer $$$j$$$ ($$$1 \le j \le n$$$) — the position of the patient in the queue, for which Sam wants to know the status.

All queries are correct, that means that there always exists an example of the queue of length $$$n$$$ for which all reported results (statements from queries with $$$t = 0$$$) are true.

Output:

After each Sam question (query with $$$t = 1$$$) print:

• "NO", if the patient is definitely not sick,
• "YES", if the patient is definitely sick.
• "N/A", if it is impossible to definitely identify the status of patient having the given information.

Sample Input:

6 9
0 4 5 0
1 5
1 6
0 4 6 1
1 6
0 2 5 1
0 2 2 0
1 3
1 2

Sample Output:

NO
N/A
YES
YES
NO

Note:

In the first test for the five first queries:

1. Initially Sam tells that people $$$4$$$, $$$5$$$ are not sick.
2. In the next query Sam asks the status of the patient $$$5$$$. From the previous query, we know that the patient is definitely not sick.
3. In the next query Sam asks the status of the patient $$$6$$$. We don't know any information about that patient now.
4. After that Sam tells that there exists a sick patient among $$$4$$$, $$$5$$$, $$$6$$$.
5. In the next query Sam asks the status of the patient $$$6$$$. Now we can tell that this patient is definitely sick.