- 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
5 3 3 2 3 1 2 1 3 2 4 1 5
2 3 3