#include <stdlib.h>
#include <fstream>
#define HEAP_MAX_SIZE 200005

using namespace std;

typedef struct
	heap
	{
		int heapToIndex[ HEAP_MAX_SIZE ], indexToHeap[ HEAP_MAX_SIZE ], values[ HEAP_MAX_SIZE ];
		int size, valuesSize;
		
		heap( )
		{
			size = 0;
			valuesSize = 0;
		}
		
	} heap;

void percolate( heap &myHeap, int heapIndex )
{
	int auxValue = myHeap.values[ myHeap.heapToIndex[ heapIndex ] ], myIndex = myHeap.heapToIndex[ heapIndex ];
	while( heapIndex > 0 && auxValue < myHeap.values[ myHeap.heapToIndex[ heapIndex / 2 ] ] )
	{
		myHeap.heapToIndex[ heapIndex ] = myHeap.heapToIndex[ heapIndex / 2 ];
		myHeap.indexToHeap[ myHeap.heapToIndex[ heapIndex / 2 ] ] = heapIndex;
		heapIndex /= 2;
	}
	myHeap.heapToIndex[ heapIndex ] = myIndex;
	myHeap.indexToHeap[ myIndex ] = heapIndex;
}

void insert( heap &myHeap, int value )
{	
	myHeap.values[ myHeap.valuesSize ] = value;
	myHeap.indexToHeap[ myHeap.valuesSize ] = myHeap.size;
	myHeap.heapToIndex[ myHeap.size ] = myHeap.valuesSize;	
	++myHeap.valuesSize;
	++myHeap.size;
	percolate( myHeap, myHeap.size - 1 );	
}	 

int leftSon( int heapIndex )
{
	return 2 * heapIndex + 1;
}

int rightSon( int heapIndex )
{
	return 2 * heapIndex + 2;
}

int getSon( heap myHeap, int heapIndex )
{
	if( leftSon( heapIndex ) <= myHeap.size && myHeap.values[ myHeap.heapToIndex[ leftSon( heapIndex ) ] ] < myHeap.values[ myHeap.heapToIndex[ heapIndex ] ] )
		return leftSon( heapIndex );
	if( rightSon( heapIndex ) <= myHeap.size && myHeap.values[ myHeap.heapToIndex[ rightSon( heapIndex ) ] ] < myHeap.values[ myHeap.heapToIndex[ heapIndex ] ] )
		return rightSon( heapIndex );
	return -1;
}

void sift( heap &myHeap, int heapIndex )
{
	int myIndex = myHeap.heapToIndex[ heapIndex ];
	int son;
	while( ( son = getSon( myHeap, heapIndex ) ) != -1 )
	{
		myHeap.heapToIndex[ heapIndex ] = myHeap.heapToIndex[ son ];
		myHeap.indexToHeap[ myHeap.heapToIndex[ son ] ] = heapIndex;
		heapIndex = son;
	}
	myHeap.heapToIndex[ heapIndex ] = myIndex;
	myHeap.indexToHeap[ myIndex ] = heapIndex;
}

void remove( heap &myHeap, int valueIndex )
{
	int heapIndex = myHeap.indexToHeap[ valueIndex ];	
	--myHeap.size;
	myHeap.indexToHeap[ valueIndex ] = -1;
	myHeap.heapToIndex[ heapIndex ] = myHeap.heapToIndex[ myHeap.size ];
	myHeap.indexToHeap[ myHeap.heapToIndex[ myHeap.size ] ] = heapIndex;
	if( myHeap.values[ myHeap.heapToIndex[ heapIndex ] ] < myHeap.values[ myHeap.heapToIndex[ heapIndex / 2 ] ] )
		percolate( myHeap, heapIndex );
	else
		sift( myHeap, heapIndex );
}

int main( )
{
	ifstream in( "heapuri.in" );
	ofstream out( "heapuri.out" );
	heap myHeap;
	int tasksNumber, task;
	in >> tasksNumber;
	for( int index = 0; index < tasksNumber; ++index )
	{
		in >> task;
		if( task == 1 )
		{	
			int value;
			in >> value;
			insert( myHeap, value );
		}
		else
			if( task == 2 )
			{
				int valueIndex;
				in >> valueIndex;
				remove( myHeap, valueIndex - 1 );
			}
			else
				out << myHeap.values[ myHeap.heapToIndex[ 0 ] ] << "\n";
	}
	return EXIT_SUCCESS;
}