评测记录

#include<bits/stdc++.h>
#define int long long 
using namespace std;
int n, m, cnt;
map <string, bool> v;
int main()
{
	scanf ("%d %d", &n, &m);
	for (int i = 0; i < n; ++ i)
	{
		string a;
		cin >> a;
		v[a] = 1;
	}
	for (int i = 0; i < m; ++ i)
	{
		string b;
		cin >> b;
		if (v[b])++ cnt;
	}
	printf ("%lld", cnt);
	return 0;
}