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#include <bits/stdc++.h>
using namespace std;
long long st[2000003], top, k, n;
long long a[2000003];
void Sterge(int x)
{
int i;
for(i = x; i < k; i++)
a[i] = a[i+1];
}
int Find(int x)
{
int i;
for(i = 1; i <= k; i++)
if(a[i] == x)
return i;
}
void Afisare()
{
int i;
for(i =1; i <= k; i++)
cout<<a[i]<<" ";
cout<<"\n";
}
void Citire()
{ int i, op, x;
long long minim;
int j;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");
fin >> n;
for(i = 1; i <= n; i++)
{
fin >> op;
if(op == 1)
{
fin >> x;
st[++top] = x;
a[++k] = x;
}
else if(op == 2)
{
fin >> x;
Sterge(Find(st[x]));
k--;
}
else
{ minim = a[1];
for(j = 2; j <= k; j++)
minim = min(minim, a[j]);
fout << minim<<"\n";
}
}
}
int main()
{
Citire();
return 0;
}