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题目描述

Farmer John has just arranged his N haybales ( 1≤N≤100,000) at various points along the one-dimensional road running across his farm. To make sure they are spaced out appropriately, please help him answer Q queries ( 1≤Q≤100,000), each asking for the number of haybales within a specific interval along the road.

格式

输入格式

The first line contains N and Q.
The next line contains N distinct integers, each in the range 0…1,000,000,000, indicating that there is a haybale at each of those locations.

Each of the next Q lines contains two integers A and B ( 0≤A≤B≤1,000,000,000) giving a query for the number of haybales between A and B, inclusive.

输出格式

You should write Q lines of output. For each query, output the number of haybales in its respective interval.

样例 1

样例输入

4 6
3 2 7 5
2 3
2 4
2 5
2 7
4 6
8 10

样例输出

2
2
3
4
1
0

限制

各个测试点1s，256MB内存空间。