- Time limit: 1.00 s
- Memory limit: 512 MB
Your task is to efficiently process the following types of queries:
- Add a line that is active in range
- Find the maximum point in any active line at position
Input
The first line has an integer : the number of queries.
The following lines describe the queries. The format of each line is either "1 " or "2 ".
Output
Print the answer for each query of type 2. If no line is active, print NO
.
Constraints
Example
Input:
6 1 1 2 1 3 2 3 2 4 1 0 4 1 5 2 3 2 4
Output:
5 NO 5 4