Description

Finding Same Keys

Input (Standard input)
In the first line, the number of input keys N and M (1≤N, M≤100000) are given where
N is the number of keys in set A and M is the number of keys in set B.
The keys in set A are given in the second line and the keys in set B are given in the third line.

Output (Standard output) print the number of keys both in A and B.

[Example]
Input Output
7 5
1 4 5 3 2 9 6
3 5 4 7 8 3

Description
1. File name must be FindingSameKeys.cpp
2. Make a comment of your student ID, name and class in the first line of the source code. ex) 2008601028_Honggildong_A or 2008601028_홍길동 _A
3. Please keep the source code that you have submitted for some unexpected accident.