/*
             author:ryo3ihara
            　　　　　　　”継続は力なり、雨だれ石を穿つ”
            　　　　　　　　　　”slow but steady wins the race”


*/

#pragma GCC optimize("Ofast")
#include<bits/stdc++.h>

//#include<atcoder/all>
//using namespace atcoder;

/* 
// 多倍長テンプレ
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
namespace mp = boost::multiprecision;
// 任意長整数型
using Bint = mp::cpp_int;
// 仮数部が1024ビットの浮動小数点数型(TLEしたら小さくする)
using Real = mp::number<mp::cpp_dec_float<1024>>;
*/

using namespace std;
using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
using pli = pair<ll, int>;
using pii = pair<int, int>;
using pld = pair<ll, ld>;
using ppiii =  pair<pii, int>;
using ppiill = pair<pii, ll>;
using ppllll = pair<pll, ll>;
using pplii = pair<pli, int>;
using mii = map<int, int>;
using dll = deque<ll>;
using qll = queue<ll>;
using pqll = priority_queue<ll>;
using pqrll = priority_queue<ll, vector<ll>, greater<ll>>;
using vint = vector<int>;
using vll = vector<ll>;
using vpll = vector<pll>;
using vvll = vector<vector<ll>>;
using vvint = vector<vector<int>>;
using vvpll = vector<vector<pll>>;

//マクロ
//forループ
#define REP(i,n) for(ll i=0;i<ll(n);i++)
#define REPD(i,n) for(ll i=n-1;i>=0;i--)
#define FOR(i,a,b) for(ll i=a;i<=ll(b);i++)
#define FORD(i,a,b) for(ll i=a;i>=ll(b);i--)
#define ALL(x) x.begin(),x.end() 
#define rALL(x) x.rbegin(),x.rend() 
#define SIZE(x) ll(x.size()) 
#define fs first
#define sc second
#define INF32 2147483647 //2.147483647x10^{9}:32bit整数のinf
#define INF64 9223372036854775807 //9.223372036854775807x10^{18}:64bit整数のinf
//定数
const ll MOD = 1000000007;
const int inf = 1e9;
const ll INF = 1e18;
const ll MAXR = 100000; //10^5:配列の最大のrange

inline void Yes(bool b = true) { cout << (b ? "Yes" : "No") << '\n'; }
inline void YES(bool b = true) { cout << (b ? "YES" : "NO") << '\n'; }

//最大化問題最小化問題
template<class T> inline bool chmin(T& a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template<class T> inline bool chmax(T& a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}
//高速冪乗化　modの時は一部入れ替える
ll power(ll a, ll b) {
    ll res=1;
    while (b>0) {
        if (b&1){
            res*=a;
            //res%=MOD;
        }
        b/=2;
        a*=a;
        //a%=MOD;
    }
    return res;
}
ll power2(ll x, ll y) {
    if(y == 0) return 1;
    if(y == 1) {
        return x;
        // return x % MOD;
    }
    ll ans;
    if(y % 2 == 1) {
        ll r = power(x,(y-1)/2);
        //ans = r * r % MOD;
        //ans = ans * x % MOD;
        ans = x * r * r;
    }
    else {
        ll r = power(x,y/2);
        //ans = r * r % MOD;
        ans = r * r;
    }
    return ans;
}
/*
Bint powerb(Bint x, Bint y) {
    if(y == 0) return 1;
    if(y == 1) {
        return x;
        // return x % MOD;
    }
    Bint ans;
    if(y % 2 == 1) {
        Bint r = powerb(x,(y-1)/2);
        //ans = r * r % MOD;
        //ans = ans * x % MOD;
        ans = x * r * r;
    }
    else {
        Bint r = powerb(x,y/2);
        //ans = r * r % MOD;
        ans = r * r;
    }
    return ans;
}
*/

template<class VAL> struct RBST {
    VAL SUM_UNITY = 0;                              // to be set

    unsigned int randInt() {
        static unsigned int tx = 123456789, ty = 362436069, tz = 521288629, tw = 88675123;
        unsigned int tt = (tx ^ (tx << 11));
        tx = ty; ty = tz; tz = tw;
        return (tw = (tw ^ (tw >> 19)) ^ (tt ^ (tt >> 8)));
    }

    struct NODE {
        NODE *left, *right;
        VAL val;                        // the value of the node
        int size;                       // the size of the subtree 
        VAL sum;                        // the value-sum of the subtree

        NODE() : val(SUM_UNITY), size(1), sum(SUM_UNITY) {
            left = right = NULL;
        }

        NODE(VAL v) : val(v), size(1), sum(v) {
            left = right = NULL;
        }

        /* additional update */
        inline void update() {

        }

        /* additional lazy-propagation */
        inline void push() {

            /* ex: reverse */
            /*
            if (this->rev) {
            swap(this->left, this->right);
            if (this->left) this->left->rev ^= true;
            if (this->right) this->right->rev ^= true;
            this->rev = false;
            }
            */
        }
    };


    ///////////////////////
    // root
    ///////////////////////

    NODE* root;
    RBST() : root(NULL) { }
    RBST(NODE* node) : root(node) { }


    ///////////////////////
    // basic operations
    ///////////////////////

    /* size */
    inline int size(NODE *node) {
        return !node ? 0 : node->size;
    }
    inline int size() {
        return this->size(this->root);
    }

    /* sum */
    inline VAL sum(NODE *node) {
        return !node ? SUM_UNITY : node->sum;
    }
    inline VAL sum() {
        return this->sum(this->root);
    }

    /* update, push */
    inline NODE* update(NODE *node) {
        node->size = size(node->left) + size(node->right) + 1;
        node->sum = sum(node->left) + sum(node->right) + node->val;
        node->update();
        return node;
    }

    inline void push(NODE *node) {
        if (!node) return;
        node->push();
    }

    /* lower_bound */
    inline int lowerBound(NODE *node, VAL val) {
        push(node);
        if (!node) return 0;
        if (val <= node->val) return lowerBound(node->left, val);
        else return size(node->left) + lowerBound(node->right, val) + 1;
    }
    inline int lowerBound(VAL val) {
        return this->lowerBound(this->root, val);
    }

    /* upper_bound */
    inline int upperBound(NODE *node, VAL val) {
        push(node);
        if (!node) return 0;
        if (val >= node->val) return size(node->left) + upperBound(node->right, val) + 1;
        else return upperBound(node->left, val);
    }
    inline int upperBound(VAL val) {
        return this->upperBound(this->root, val);
    }

    /* count */
    inline int count(VAL val) {
        return upperBound(val) - lowerBound(val);
    }

    /* get --- k: 0-index */
    inline VAL get(NODE *node, int k) {
        push(node);
        if (!node) return -1;
        if (k == size(node->left)) return node->val;
        if (k < size(node->left)) return get(node->left, k);
        else return get(node->right, k - size(node->left) - 1);
    }
    inline VAL get(int k) {
        return get(this->root, k);
    }


    ///////////////////////
    // merge-split
    ///////////////////////

    NODE* merge(NODE *left, NODE *right) {
        push(left);
        push(right);
        if (!left || !right) {
            if (left) return left;
            else return right;
        }
        if (randInt() % (left->size + right->size) < left->size) {
            left->right = merge(left->right, right);
            return update(left);
        }
        else {
            right->left = merge(left, right->left);
            return update(right);
        }
    }
    void merge(RBST add) {
        this->root = this->merge(this->root, add.root);
    }
    pair<NODE*, NODE*> split(NODE* node, int k) { // [0, k), [k, n)
        push(node);
        if (!node) return make_pair(node, node);
        if (k <= size(node->left)) {
            pair<NODE*, NODE*> sub = split(node->left, k);
            node->left = sub.second;
            return make_pair(sub.first, update(node));
        }
        else {
            pair<NODE*, NODE*> sub = split(node->right, k - size(node->left) - 1);
            node->right = sub.first;
            return make_pair(update(node), sub.second);
        }
    }
    RBST split(int k) {
        pair<NODE*, NODE*> sub = split(this->root, k);
        this->root = sub.first;
        return RBST(sub.second);
    }


    ///////////////////////
    // insert-erase
    ///////////////////////

    void insert(const VAL val) {
        pair<NODE*, NODE*> sub = this->split(this->root, this->lowerBound(val));
        this->root = this->merge(this->merge(sub.first, new NODE(val)), sub.second);
    }

    void erase(const VAL val) {
        if (!this->count(val)) return;
        pair<NODE*, NODE*> sub = this->split(this->root, this->lowerBound(val));
        this->root = this->merge(sub.first, this->split(sub.second, 1).second);
    }


    ///////////////////////
    // debug
    ///////////////////////

    void print(NODE *node) {
        if (!node) return;
        push(node);
        print(node->left);
        cout << node->val << " ";
        print(node->right);
    }
    void print() {
        cout << "{";
        print(this->root);
        cout << "}" << endl;
    }
};


signed main(){
    //入力の高速化用のコード
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    //入力
    RBST<ll> S;
    ll Q,K;
    cin >> Q >> K;
    REP(_,Q){
        int T;
        cin >> T;
        if(T==1){
            ll val;
            cin >> val;
            S.insert(val);
        }
        else{
            if(S.size()<K){
                cout << -1 << endl;
                continue;
            }

            ll res = S.get(K-1);
            cout << res << endl;
            S.erase(res);
        }
    }

  return 0;
}