#include <cstdio>
#include <vector>
using namespace std;

const int mod = 666013;

vector <int> g[mod];
int n,c,nr;

vector<int>::iterator find_val(int x){
    for(vector<int>::iterator it = g[x%mod].begin(); it != g[x%mod].end(); ++it)
        if(*it == x)
            return it;
    return g[x%mod].end();
}

void insert_val(int x){
    if(find_val(x) == g[x%mod].end())
        g[x%mod].push_back(x);
}

void erase_val(int x){
    vector<int>::iterator it = find_val(x);
    if(it != g[x%mod].end())
        g[x%mod].erase(it);
}

int main(){
    freopen("hashuri.in", "r", stdin);
    freopen("hashuri.out", "w", stdout);

    scanf("%d", &n);
    for(int i = 1; i <= n; ++i){
        scanf("%d %d", &c, &nr);
        if(c == 1)
            insert_val(nr);
        else if(c == 2)
            erase_val(nr);
        else
            printf("%d\n", find_val(nr) != g[nr%mod].end());
    }

    return 0;
}