fugurinhas.cpp

#include <bits/stdc++.h>

using namespace std;

const int maxn = 110;

int compra[maxn];
int car[maxn];

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	
	int n, c, m;
	cin >> n >> c >> m;

	for (int i = 0; i < c; i++) {

		int a;
		cin >> a;

		car[a] = 1;
	}

	for (int i = 0; i < m; i++) {

		int a;
		cin >> a;

		compra[a] = 1;
	}

	int ans = c;
	for (int i = 1; i <= n; i++) {

		if (car[i] and compra[i]) ans--;
	}

	cout << ans << "\n";
}