#include<fstream>
#include<cmath>
#include<vector>
#define P 999983
#define pb push_back
//#include<iostream>
using namespace std;
class InParser {
    vector<char> str;
    int ptr;
    ifstream fin;

    char getChar() {
        if (ptr == int(str.size())) {
            fin.read(str.data(), str.size());
            ptr = 0;
        }
        return str[ptr++];
    }

    template<class T>
    T getInt() {
        char chr = getChar();
        while (!isdigit(chr) && chr != '-')
            chr = getChar();
        int sgn = +1;
        if (chr == '-') {
            sgn = -1;
            chr = getChar();
        }
        T num = 0;
        while (isdigit(chr)) {
            num = num * 10 + chr - '0';
            chr = getChar();
        }
        return sgn * num;
    }

public:
    InParser(const char* name) : str(1e5), ptr(str.size()), fin(name) { }
    ~InParser() { fin.close(); }

    template<class T>
    friend InParser& operator>>(InParser& in, T& num) {
        num = in.getInt<T>();
        return in;
    }
};
class OutParser {
    vector<char> str;
    int ptr;
    ofstream fout;

    void putChar(char chr) {
        if (ptr == int(str.size())) {
            fout.write(str.data(), str.size());
            ptr = 0;
        }
        str[ptr++] = chr;
    }

    template<class T>
    void putInt(T num) {
        if (num < 0) {
            putChar('-');
            num *= -1;
        }
        if (num > 9)
            putInt(num / 10);
        putChar(num % 10 + '0');
    }

public:
    OutParser(const char* name) : str(1e5), ptr(0), fout(name) { }
    ~OutParser() { fout.write(str.data(), ptr); fout.close(); }

    template<class T>
    friend OutParser& operator<<(OutParser& out, const T num) {
        out.putInt(num);
        return out;
    }

    friend OutParser& operator<<(OutParser& out, const char chr) {
        out.putChar(chr);
        return out;
    }

    friend OutParser& operator<<(OutParser& out, const char* str) {
        for (int i = 0; str[i]; i++)
            out.putChar(str[i]);
        return out;
    }
};
InParser cin("hashuri.in");
OutParser cout("hashuri.out");
vector<int> h[P];
void adaugare(int x)
{
    int r=x%P;
    h[r].pb(x);
}
int cautare(int x)
{
    int r = x % P;
    unsigned i, L;
    L = h[r].size();
    for (i = 0; i < L; i++)
        if (h[r][i] == x)
        {
            return 1;
        }
    return 0;
}
void eliminare(int x)
{
    int r = x % P;
    unsigned i, L;
    L = h[r].size();
    for (i = 0; i < L; i++)
        if (h[r][i] == x)
        {
            h[r][i] = h[r][L-1];
            h[r].pop_back();
            return;
        }
}
int main()
{
int n,x,y;
cin>>n;
for(;n;n--)
{
    cin>>x>>y;
    if(x==1)
        adaugare(y);
    else
        if(x==2)
            eliminare(y);
        else
            cout<<cautare(y)<<'\n';
}
}