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**Task** | Statistics

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 $[a,b]$?

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 $b$.

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

- $1 \le n,q \le 2 \cdot 10^5$

- $1 \le x_i \le 10^9$

- $1 \le a \le b \le n$

Input:

`5 3`

3 2 3 1 2

1 3

2 4

1 5

Output:

`2`

3

3