#include<stdio.h>
#include<stdlib.h>
#include<time.h>
 
#define Nmax 1000010
#define P 1000000009
#define M 300007
 
int H1[M+5][4], H2[M+5][4], S[Nmax], op, T, X ;
long long A1, A2, B1, B2 ;
 
int search ( int X ) 
{
    int i ; 
    long long h1, h2 ; 
     
    h1 = ( (A1 * X + B1) % P ) % M ; 
    h2 = ( (A2 * X + B2) % P ) % M ;
 
    for( i = 0 ; i < 4 ; i++ )
        if( H1[h1][i] == X || H2[h2][i] == X ) 
            return 1 ;
     
    return 0 ;
}
     
void make_hash() ;
 
void insert ( int X ) 
{
    int i ;
    long long h1, h2 ; 
     
    h1 = ( (A1 * X + B1) % P ) % M ; 
    h2 = ( (A2 * X + B2) % P ) % M ;
 
    for( i = 0 ; i < 4 ; i++ )
        if( H1[h1][i] == X || H2[h2][i] == X ) return ;
     
    for( i = 0 ; i < 4 ; i++ )
        if( !H1[h1][i] ) 
        {
            H1[h1][i] = X ; 
            return ;
        }
        else if( !H2[h2][i] ) 
        {
            H2[h2][i] = X ;
            return ;
        }
 
    make_hash();
}
 
void erase ( int X ) 
{
    int i,j ;
    long long h1, h2 ; 
     
    h1 = ( (A1 * X + B1) % P ) % M ; 
    h2 = ( (A2 * X + B2) % P ) % M ;
     
    for( i = 0 ; i < 4 ; i++ )
        if( H1[h1][i] == X ) 
        {
            for( j = i ; j < 3 ; j++ )
                H1[h1][j] = H1[h1][j+1];
            H1[h1][j] = 0 ;  
        }
        else
        if( H2[h2][i] == X ) 
        {
            for( j = i ; j < 3 ; j++ )
                H2[h2][j] = H2[h2][j+1];
            H2[h2][j] = 0 ;
        }
}
 
void make_hash () 
{
    int i,j;
     
    int N = 0 ;
     
    for( i = 0 ; i < M ; i++ )
        for( j = 0 ; j < 4 ; H1[i][j] = H2[i][j] = 0 , j++ )
            if( H1[i][j] ) 
                S[++N] = H1[i][j] ;
     
    A1 = rand() % P ;
    A2 = rand() % P ;
    B1 = rand() % P ;
    B2 = rand() % P ;
     
    for( i = 1 ; i <= N ; i++ )
        insert( S[i] ) ;
}
int main () 
{
    srand(time(0));
     
    freopen("hashuri.in","r",stdin);
    freopen("hashuri.out","w",stdout);
     
    scanf("%d",&T);
     
    make_hash() ; 
     
    while( T-- ) 
    {
        scanf("%d %d",&op,&X) ; 
         
        switch(op)
        {
        case 1:
            insert(X); break ; 
        case 2:
            erase(X); break ; 
        case 3:
            printf("%d\n",search(X)); break ; 
        }
    }
     
    return 0 ;
}