[10816] 숫자 카드2 C++

https://www.acmicpc.net/problem/10816

10816번: 숫자 카드 2

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <map>

using namespace std;

int main() {

	ios_base::sync_with_stdio(0);
	cin.tie(0);

	unordered_map<int, int> list;
	int N, M;
	int search;

	cin >> N;
	for (int i = 1; i <= N; i++) {
		int num;
		cin >> num;
		if (list[num] > 0) list[num]++;
		else list[num] = 1;
	}

	cin >> M;
	for (int i = 1; i <= M; i++) {
		cin >> search;
		if (list[search] > 0) cout << list[search] << " ";
		else cout << "0 ";
	}

	return 0;
}