Cod sursa(job #940807)

Utilizator forgetHow Si Yu forget Data 17 aprilie 2013 08:59:23
Problema Hashuri Scor 70
Compilator cpp Status done
Runda Arhiva educationala Marime 0.34 kb
Raporteaza aceasta sursa 
#include <fstream>
#include <set>
using namespace std;

int main()
{
	ifstream fin("hashuri.in");
	ofstream fout("hashuri.out");
	int n;
	fin >> n;
	set<int> a;
	int op, x;
	for (int i = 0; i < n; ++i) {
		fin >> op >> x;
		if (op == 1) a.insert(x);
		else if (op == 2) a.erase(x);
		else fout << a.count(x) << '\n';
	}
	return 0;
}