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问题 A: Array of Orz Pandas

问题 A: Array of Orz Pandas

时间限制: 3 Sec  内存限制: 128 MB
提交: 89  解决: 23
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题目描述

There are several small pandas in Panda emoticon. There are N Panda emoticons in row. The numbers of small pandas in i-th Panda emoticon is A[i], i is from 1 to N. Let f(l,r) = ∑[A[i]≥K1 and A[i]≤K2] .i is from l to r inclusive. [Expression] means that Expression is a logical expression, if the expression is true, then [Expression] is 1, else 0. Calculate the result of f(l,r).

输入

The first line of the input contains two integers N and M denoting the number of Panda emoticons and the number of queries. Next line contains N integers denoting A[i].
Next M lines, each line contains four integers l ,r  K1, K2.
There are several test cases, please process to end of file.

1 ≤ N ≤ 100000, 1 ≤ M ≤ 100000.
0 ≤ A[i] ≤ 10^9, 1 ≤ l r ≤N.
0 ≤ K1 ≤ K2 ≤ 10^9.

输出

For each test case, output M lines, i-th of them is the result of the i-th query.

样例输入

4 2
1 2 3 4
1 3 2 3
1 1 1 1

样例输出

2
1

提示

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