11723번: 집합

https://www.acmicpc.net/problem/11723

풀이(unordered_map)

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <string>
#include <vector>
#include <unordered_map>
#include <sstream>

using namespace std;
unordered_map<int, int> MapArray;
string StrCalculation{};
int Value;

int main()
{
	ios_base::sync_with_stdio(false);
	cout.tie(nullptr);
	cin.tie(nullptr);
	freopen("input.txt", "rt", stdin);

	int M{};
	cin >> M;

	for (int i = 0; i < M; ++i)
	{
		cin >> StrCalculation;

		if (StrCalculation == "add")
		{
			cin >> Value;
			MapArray[Value] = 1;
		}
		else if (StrCalculation == "remove")
		{
			cin >> Value;
			MapArray[Value] = 0;
		}
		else if (StrCalculation == "check")
		{
			cin >> Value;
			if (MapArray[Value])
			{
				cout << 1 << '\n';
			}
			else
			{
				cout << 0 << '\n';
			}
		}
		else if (StrCalculation == "toggle")
		{
			cin >> Value;
			if (MapArray[Value])
			{
				MapArray[Value] = 0;
			}
			else
			{
				MapArray[Value] = 1;
			}
		}
		else if (StrCalculation == "all")
		{
			for (int j = 1; j <= 20; ++j)
			{
				MapArray[j] = 1;
			}
		}
		else
		{
			for (int j = 1; j <= 20; ++j)
			{
				MapArray[j] = 0;
			}
		}
	}

	return 0;
}

풀이(bitmasking)