What is Y in the test case?

#1

couldn’t figure out what is is

#2

Y is the number you have to find in the range L, R present in the array
Y is the element of array in the range l to r
and x is the given element (given in query of type 1)

Question Explanation:

you have to visualize the array
initially array is empty

now if query of type 0 came you have to insert element into array

after these querys
0 3
0 5
0 10
0 6
array will be [3,5,10,6]

now query type 1 came
1 1 4 6
you have to take array portion from 1 to 4 and take xor with 6
whose xor is max is the ans
3^6 = 5
5^6 = 3
10^6 = 12
6^6 = 0

max ans is 12 for 10 so ans is 10

#3

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