#include<cstdio>
int h[200001],n,k,i,r,j,p[200001],v[200001],z,y,x;

void A(int t)
{int y;
while(t/2&&v[h[t]]<v[h[t/2]])
      y=h[t],h[t]=h[t/2],h[t/2]=y,p[h[t]]=t,p[h[t/2]]=t/2,t/=2;}

int main()
{freopen("heapuri.in","r",stdin);
freopen("heapuri.out","w",stdout);
scanf("%d",&n);
while(n--)
      {scanf("%d",&z);
      if(z==3)
              printf("%d\n",v[h[1]]);
      else
              {scanf("%d",&r);
              if(z==1)
                      v[++j]=r,p[j]=h[j]=j,A(j);
              else
                      
                      {v[r]=-1,A(p[r]),p[h[1]]=y=0,h[1]=h[j--],p[h[1]]=x=1;
                      while(x!=y)
                            {y=x;
                            if(2*y<=j&&v[h[x]]>v[h[2*y]])
                                   x=2*y;
                            if(2*y<j&&v[h[x]]>v[h[2*y+1]])
                                   x=2*y+1;
                            z=h[x],h[x]=h[y],h[y]=z,p[h[x]]=x,p[h[y]]=y;}}}}
return 0;}