#include<stdio.h>
#include<vector>
using namespace std;
int n,i,j,x,op,ok,poz;
const int p=666013;
vector<int> h[p];
int main()
{
	freopen("hashuri.in",""r,stdin);
	freopen("hashuri.out","w",stdout);
	scanf("%d",&n);
	while(n--)
	{
		scanf("%d%d",&op,&x);
		if(op==1)
		{
			for(i=0;i<h[x%p].size();i++)
				if(x==h[x%p][i])
					ok=1;
			if(ok==0)
			h[x%p].push_back(x);
		}
		if(op==2)
		{
			for(i=0;i<h[x%p].size();i++)
				if(x==h[x%p][i])
					ok=1,poz=i;
			if(ok==1)
			swap(h[x%p][poz],h[x%p][h[x%p].size()-1]),h[x%p].pop_back(x);
		}
		if(op==3)
		{
			for(i=0;i<h[x%p].size();i++)
				if(x==h[x%p][i])
					ok=1;
			if(ok==1)printf("1\n");
			else printf("0\n");
		}
	ok=0;
	}
	return 0;
}