[Usaco2016 Dec]Counting Haybales

Farmer John has just arranged his NN haybales (1≤N≤100,0001≤N≤100,000) at various points along t

he one-dimensional road running across his farm. To make sure they are spaced out appropriately, ple

ase help him answer QQ queries (1≤Q≤100,0001≤Q≤100,000), each asking for the number of haybales 

within a specific interval along the road.

The first line contains N and Q.The next line contains N distinct integers, each in the range 0…1,0

00,000,000 indicating that there is a haybale at each of those locations.Each of the next Q lines co

ntains two integers AA and BB (0≤A≤B≤1,000,000,000) giving a query for the number of haybales bet

ween A and B, inclusive.

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

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

2
2
3
4
1
0