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CSES Problem Set

Distinct Values Queries


Task | Statistics


CSES - Distinct Values QueriesCSES - Distinct Values Queries

Time limit:1.00 s Memory limit:512 MB

You are given an array of $n$ integers and $q$ queries of the form: how many distinct values are there in a range $[a,b]$?

Input

The first input line has two integers $n$ and $q$: the array size and number of queries.

The next line has $n$ integers $x_1,x_2,\dots,x_n$: the array values.

Finally, there are $q$ lines describing the queries. Each line has two integers $a$ and $b$.

Output

For each query, print the number of distinct values in the range.

Constraints
Example

Input:
5 3
3 2 3 1 2
1 3
2 4
1 5


Output:
2
3
3