Eat or Be Eaten
Time Limit : 3 Second
Memory Limit : 128 MB
Submission: 133
Solved: 57
 Description
Deep down under the sea, there're two kinds of living organism, let's say A and B. A is B's predator, but A will only eat B if and only if its size is strictly bigger than its prey. For example, let the size of A = {8, 1, 7, 3, 1} and B = {3, 6, 1}, then there are 7 pairs of A  B where A > B: 8  3, 8  6, 8  1, 7  3, 7  6, 7  1, 3  1.
Given the size of each organism in A and B, write a program to count how many pair of A  B are there such that A is strictly bigger than B. Your program should be efficient as the number of organism may be large.
 Input
 The first line of input contains an integer T, the number of test cases follow.
Each case will begin with two integers N (1 <= N <= 20,000) and M (1 <= M <= 20,000), denoting the number of organism A and B respectively. The next line will contain N positive integers represent the size of each A organism. The third line will contain M positive integers represent the size of each B organism.
 Output
 For each case, print on a single line the number of pair A  B such that A is strictly larger than B.
 sample input

2 5 3 8 1 7 3 1 3 6 1 3 4 2 13 7 103 11 290 215
 sample output

7 1
 hint
 source