#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
const int MAXN = 1e6 + 5;
int son[MAXN][2],fa[MAXN],sz[MAXN],cnt[MAXN],key[MAXN],n,a,b;
int size = 0,root = 0;
inline void clear(int x)
{
    son[x][0] = son[x][1] = fa[x] = sz[x] = cnt[x] = key[x] = 0
 
;
}
inline bool get(int x)
{
    return son[fa[x]][1] == x;
}
inline void hs(int x)
{
    if(x)
    {
        sz[x] = cnt[x];
        if(son[x][0]) sz[x] += sz[son[x][0]];
        if(son[x][1]) sz[x] += sz[son[x][1]];
    }
}
inline void xuanz(int x)
{
    int y = fa[x],z = fa[y];
    bool wh = get(x);
    son[y][wh] = son[x][wh^1
 
];
    fa[son[x][wh^1]] = y;son[x][wh^1] = y;
    fa[x] = z;fa[y] = x;
    if(z)
        son[z][son[z][1] == y] = x;
    hs(y);hs(x);
}
inline void splay(int x)
{
    for(int f;f = fa[x];xuanz(x))
        if(fa[f])
            xuanz(get(x) == get(f)?f:x);
    root = x;
}
inline void insert(int x)
{
    if
 
(root == 0)
    {
        son[size][0] = son[size][1] = fa[++size] = 0;
        root = size;sz[size] = cnt[size] = 1;key[size] = x;
        return;
    }
    int now = root,f = 0;
    while(1)
    {
        if(x == key[now])
        {
            cnt[now] ++;
            if(now == root)
                hs(now);
            splay(now);break;
        }
        f = now;now = son[now][key[now] < x];
        if(now == 0)
        {
            son[size][0] = son[++size][1] = 0;
            fa[size] = f;sz[size] = cnt[size] = 1;
            son[f][key[f] < x] = size;
            key[size] = x;splay(size);
            break;
        }
    }
}
inline int find(int x)
{
    int now = root,ans = 0;
    while(1)
    {
        if(x < key[now])
            now = son[now][0];
        else
        {
            ans += son[now][0] ? sz[son[now][0]] : 0;
            if(x == key[now])
            {
                splay(now);
                return ans + 1;
            }
            ans += cnt[now];
            now = son[now][1];
        }
    }
}
inline int findx(int x)
{
    int now = root;
    while(1)
    {
        if(son[now][0]&&x <= sz[son[now][0]])
            now = son[now][0];
        else
        {
            int temp = (son[now][0] ? sz[son[now][0]] : 0) + cnt[now];
            if(x <= temp) return key[now];
            x -= temp;now = son[now][1];
        }
    }
}
inline int pre()
{
    int now = son[root][0];
    while(son[now][1])
        now = son[now][1];
    return now;
}
inline int nex()
{
    int now = son[root][1];
    while(son[now][0])
        now = son[now][0];
    return now;
}
inline void del(int x)
{
    int we = find(x);
    if(cnt[root] > 1)
    {
        cnt[root] --;
        hs(root);
        return;
    }
    if(!son[root][0]&&!son[root][1])
    {
        clear(root);
        root = 0;
        return;
    }
    if(!son[root][0])
    {
        int now = root;root = son[root][1];
        fa[root] = 0; clear(now);
        return;
    }
    if(!son[root][1])
    {
        int now = root;root = son[root][0];
        fa[root] = 0; clear(now);
        return;
    }
    int l = pre(),f = root;
    splay(l);
    son[root][1] = son[f][1];
    fa[son[f][1]] = root;
    clear(f);
    hs(root);
}
int main()
{
    scanf("%d",&n);
    for(int i = 1;i <= n;i ++)
    {
        scanf("%d%d",&a,&b);
        switch(a)
        {
            case 1: insert(b);break;
            case 2: del(b);break;
            case 3: cout<<find(b)<<'\n';break;
            case 4: cout<<findx(b)<<'\n';break;
            case 5: insert(b);cout<<key[pre()]<<'\n';del(b);break;
            case 6: insert(b);cout<<key[nex()]<<'\n';del(b);break;
        }
    }
}