#include <stdio.h>
#include <string.h>

int i, j, N;


unsigned int lowbias32(unsigned int x) {
    x ^= x >> 16;
    x *= 0x7feb352d;
    x ^= x >> 15;
    x *= 0x846ca68b;
    x ^= x >> 16;
    return x;
}
/*
// inverse
uint32_t
lowbias32_r(uint32_t x)
{
    x ^= x >> 16;
    x *= 0x43021123;
    x ^= x >> 15 ^ x >> 30;
    x *= 0x1d69e2a5;
    x ^= x >> 16;
    return x;
}*/

struct bucket {
	unsigned int capacity;
	unsigned int count;
	unsigned int *members;
};

typedef struct bucket bucket;
bucket *hashtable[512];

unsigned int binary_search(unsigned int val, unsigned int *a, unsigned int start, unsigned int end) {
	unsigned int N = end - start + 1, i, step;
    for (step = 1; step < N; step <<= 1);
    for (i = 0; step; step >>= 1){
        if (i + step < N && a[start+ i + step] <= val) {
            i += step;
       }
    }
    return start+i;
}

void op_add(unsigned int index, unsigned int n) {
	bucket *b = hashtable[index];
	unsigned int pos = binary_search(n, b->members, 0, b->count), i;
	
	if (b->members[pos] == n) {
		return;
	}
	if (b->count == b->capacity) {
		b->members = realloc(b->members, b->capacity<<3);
		b->capacity <<= 1;
	}
	if (pos < b->count - 1) {
		memmove(b->members+pos+1, b->members+pos, b->count-pos);
	}
	b->members[b->count] = n;
	b->count++;
}
void op_remove(unsigned int index, unsigned int n) {
	bucket *b = hashtable[index];
	unsigned int pos = binary_search(n, b->members, 0, b->count);
	
	if (b->members[pos] != n) {
		return;
	}
	if (pos < b->count-1) {
		memmove(b->members+pos, b->members+pos+1, b->count-pos-1);
	}
	b->members[b->count-1] = 0;
	b->count--;
}
void op_question(unsigned int index, unsigned int n) {
	bucket *b = hashtable[index];
	unsigned int pos = binary_search(n, b->members, 0, b->count);
	printf("%s", b->members[pos] == n ? "1\n" : "0\n");
}

void main() {
	unsigned int n, o, flag;
	freopen("hashuri.in", "r", stdin);
	freopen("hashuri.out", "w", stdout);
	unsigned int index;
	void *op_fct[] = {op_add, op_remove, op_question};
	
	for (i = 0; i < 512; i++) {
		hashtable[i] = malloc(sizeof(bucket));
		hashtable[i]->members = calloc(1300, sizeof(unsigned int));
		hashtable[i]->capacity = 1300;
		hashtable[i]->count = 0;
	}   
	
	scanf("%d", &N);
	i = N;
	while (1) {
		i--;
		scanf("%u %u", &o, &n);
		index = (lowbias32(n) & 0x1ff);
		//if (o == 1)
		((void (*)(unsigned int, unsigned int))op_fct[o-1])(index, n);
		if (i == 0)
	        break;
	}

	return;
}