#include <stdio.h>
#include <iostream>

#define MAXN 200000

inline int parent( int ind ) { return (ind - 1) / 2; }
inline int left_child( int ind ) { return ind * 2 + 1; }
inline int right_child( int ind ) { return ind * 2 + 2; }

int heap[MAXN];
int cron[MAXN], heaptocron[MAXN];
int heap_size, n_cr;

void swap( int nod1, int nod2 ) {
  int c1, c2;
  std::swap( heap[nod1], heap[nod2] );
  c1 = heaptocron[nod1];
  c2 = heaptocron[nod2];
  std::swap( heaptocron[nod1], heaptocron[nod2] );
  std::swap( cron[c1], cron[c2] );
}

void upHeap( int nod ) {
  if( heap[nod] < heap[parent(nod)] ) {
    swap( nod, parent(nod) );
    upHeap( parent(nod) );
  }
}

void downHeap( int nod ) {
  int nod_min;
  nod_min = left_child(nod);

  if( right_child(nod) < heap_size && heap[right_child(nod)] < heap[nod_min] )
    nod_min = right_child(nod);

  if( nod_min < heap_size && heap[nod] > heap[nod_min] ) {
    swap( nod, nod_min );
    downHeap( nod_min );
  }
}

void insertVal( int x ) {
  heap[heap_size] = x;
  heaptocron[heap_size] = n_cr;
  cron[n_cr++] = heap_size;
  upHeap(heap_size++);
}

void deleteVal( int nod ) {

  swap( nod, --heap_size );
  downHeap(nod);
}

int getMin() {
  return heap[0];
}

int main() {
  FILE *fin, *fout;
  int n, i, op, x;

  fin = fopen( "heapuri.in", "r" );
  fout = fopen( "heapuri.out", "w" );

  fscanf( fin, "%d", &n );
  for( i = 0; i < n; i++ ) {
    fscanf( fin, "%d", &op );
    switch( op ) {
    case 1:
      fscanf( fin, "%d", &x );
      insertVal(x);
      break;
    case 2:
      fscanf( fin, "%d", &x );
      deleteVal( cron[x - 1] );
      break;
    case 3:
      fprintf( fout, "%d\n", getMin() );
      break;
    }
  }

  fclose( fin );
  fclose( fout );
  return 0;
}