#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0;i < n;i++)
#define ll long long
using namespace std;
typedef pair<int, int> P;
typedef pair<ll,ll> LP;
const int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
const int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};
const int INF = 1000000000;
const ll LINF = 1000000000000000000;//1e18
const double PI = acos(-1.0);
const double EPS = 1e-10;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }

/*  ----------------------- DEBUG FUNCTION ---------------------------- */
#define DUMPOUT cerr
void dump_function() { DUMPOUT << ' '; }
void dump_function(bool a) { DUMPOUT << a; }
void dump_function(int a) { DUMPOUT << a; }
void dump_function(long long a) { DUMPOUT << a; }
void dump_function(char a) { DUMPOUT << a; }
void dump_function(string &a) { DUMPOUT << a; }
void dump_function(double a) { DUMPOUT << a; }
template <class T> void dump_function(const vector<T> &);
template <class T, size_t size> void dump_function(const array<T, size> &);
template <class T, class L> void dump_function(const pair<T, L> &p);
template <class T, size_t size> void dump_function(const T (&)[size]);
template <class T> void dump_function(const vector<T> &a) {
    if(a.empty()) return;
    dump_function(a[0]);
    for(auto i = a.begin(); ++i != a.end();) {
        DUMPOUT << " ";
        dump_function(*i);
    }
    DUMPOUT << endl;
}
template <class T> void dump_function(const deque<T> &a) {
    if(a.empty()) return;
    dump_function(a[0]);
    for(auto i = a.begin(); ++i != a.end();) {
        DUMPOUT << " ";
        dump_function(*i);
    }
}
template <class T, size_t size> void dump_function(const array<T, size> &a) {
    dump_function(a[0]);
    for(auto i = a.begin(); ++i != a.end();) {
        DUMPOUT << " ";
        dump_function(*i);
    }
}
template <class T, class L> void dump_function(const pair<T, L> &p) {
    DUMPOUT << '(';
    dump_function(p.first);
    DUMPOUT << ",";
    dump_function(p.second);
    DUMPOUT << ')';
}
template <class T> void dump_function(set<T> &x) {
    for(auto e : x) dump_function(e), DUMPOUT << " ";
    DUMPOUT << endl;
}
template <class T> void dump_function(multiset<T> &x) {
    for(auto e : x) dump_function(e), DUMPOUT << " ";
    DUMPOUT << endl;
}
template <class T, size_t size> void dump_function(const T (&a)[size]) {
    dump_function(a[0]);
    for(auto i = a; ++i != end(a);) {
        DUMPOUT << " ";
        dump_function(*i);
    }
}
template <class T> void dump_function(const T &a) { DUMPOUT << a; }
int dump_out() {
    DUMPOUT << '\n';
    return 0;
}
template <class T> int dump_out(const T &t) {
    dump_function(t);
    DUMPOUT << '\n';
    return 0;
}
template <class Head, class... Tail> int dump_out(const Head &head, const Tail &... tail) {
    dump_function(head);
    DUMPOUT << ' ';
    dump_out(tail...);
    return 0;
}

#ifdef DEBUG_
#define dump(x)                                                                                                                                               \
    DUMPOUT << #x << ": ";                                                                                                                                        \
    dump_function(x);                                                                                                                                                  \
    DUMPOUT << endl;
void dumps() {}
template <class T> void dumps(const T &t) {
    dump_function(t);
    DUMPOUT << " ";
}
template <class Head, class... Tail> void dumps(const Head &head, const Tail &... tail) {
    dump_function(head);
    DUMPOUT << ' ';
    dump_out(tail...);
}
#else
#define dump(x)
template <class... T> void dumps(const T &...) {}
#endif
/*  ----------------------- DEBUG FUNCTION ---------------------------- */

template<int MOD> struct Fp {
    long long val;
    constexpr Fp(long long v = 0) noexcept : val(v % MOD) {
        if (val < 0) val += MOD;
    }
    constexpr int getmod() const { return MOD; }
    constexpr Fp operator - () const noexcept {
        return val ? MOD - val : 0;
    }
    constexpr Fp operator + (const Fp& r) const noexcept { return Fp(*this) += r; }
    constexpr Fp operator - (const Fp& r) const noexcept { return Fp(*this) -= r; }
    constexpr Fp operator * (const Fp& r) const noexcept { return Fp(*this) *= r; }
    constexpr Fp operator / (const Fp& r) const noexcept { return Fp(*this) /= r; }
    constexpr Fp& operator += (const Fp& r) noexcept {
        val += r.val;
        if (val >= MOD) val -= MOD;
        return *this;
    }
    constexpr Fp& operator -= (const Fp& r) noexcept {
        val -= r.val;
        if (val < 0) val += MOD;
        return *this;
    }
    constexpr Fp& operator *= (const Fp& r) noexcept {
        val = val * r.val % MOD;
        return *this;
    }
    constexpr Fp& operator /= (const Fp& r) noexcept {
        long long a = r.val, b = MOD, u = 1, v = 0;
        while (b) {
            long long t = a / b;
            a -= t * b, swap(a, b);
            u -= t * v, swap(u, v);
        }
        val = val * u % MOD;
        if (val < 0) val += MOD;
        return *this;
    }
    constexpr bool operator == (const Fp& r) const noexcept {
        return this->val == r.val;
    }
    constexpr bool operator != (const Fp& r) const noexcept {
        return this->val != r.val;
    }
    friend constexpr istream& operator >> (istream& is, Fp<MOD>& x) noexcept {
        is >> x.val;
        x.val %= MOD;
        if (x.val < 0) x.val += MOD;
        return is;
    }
    friend constexpr ostream& operator << (ostream& os, const Fp<MOD>& x) noexcept {
        return os << x.val;
    }
    friend constexpr Fp<MOD> modpow(const Fp<MOD>& r, long long n) noexcept {
        if (n == 0) return 1;
        auto t = modpow(r, n / 2);
        t = t * t;
        if (n & 1) t = t * r;
        return t;
    }
    friend constexpr Fp<MOD> modinv(const Fp<MOD>& r) noexcept {
        long long a = r.val, b = MOD, u = 1, v = 0;
        while (b) {
            long long t = a / b;
            a -= t * b, swap(a, b);
            u -= t * v, swap(u, v);
        }
        return Fp<MOD>(u);
    }
};

template<class T> struct BiCoef {
    vector<T> fact_, inv_, finv_;
    constexpr BiCoef() {}
    constexpr BiCoef(int n) noexcept : fact_(n, 1), inv_(n, 1), finv_(n, 1) {
        init(n);
    }
    constexpr void init(int n) noexcept {
        fact_.assign(n, 1), inv_.assign(n, 1), finv_.assign(n, 1);
        int MOD = fact_[0].getmod();
        for(int i = 2; i < n; i++){
            fact_[i] = fact_[i-1] * i;
            inv_[i] = -inv_[MOD%i] * (MOD/i);
            finv_[i] = finv_[i-1] * inv_[i];
        }
    }
    constexpr T com(int n, int k) const noexcept {
        if (n < k || n < 0 || k < 0) return 0;
        return fact_[n] * finv_[k] * finv_[n-k];
    }
    constexpr T fact(int n) const noexcept {
        if (n < 0) return 0;
        return fact_[n];
    }
    constexpr T inv(int n) const noexcept {
        if (n < 0) return 0;
        return inv_[n];
    }
    constexpr T finv(int n) const noexcept {
        if (n < 0) return 0;
        return finv_[n];
    }
    constexpr T perm(int n, int k) const noexcept {
        if (n < k || n < 0 || k < 0) return 0;
        return fact_[n] * finv_[n-k];
    }
};

/* ----------------------------- MOD ----------------------------------- */
const int MOD = 1000000007;
const int MOD2 = 998244353;
using mint = Fp<MOD>;
BiCoef<mint> bc;
// using vec = vector<mint>;
// using mat = vector<vec>;
/* ----------------------------- MOD ----------------------------------- */

/*  ----------------------- AtCoder Library ---------------------------- */
// #include <atcoder/all>
// using namespace atcoder;
/*  ----------------------- AtCoder Library ---------------------------- */


template <typename T>
class avlTree {
	struct node {
		T val;
		node *ch[2];
		int dep, size;
		node(T v, node* l = nullptr, node* r = nullptr) : val(v), dep(1), size(1) {
			ch[0] = l; ch[1] = r;
		}
	};
	int depth(node *t) { return t == nullptr ? 0 : t->dep; }
	int count(node *t) { return t == nullptr ? 0 : t->size; }
	node *update(node *t) {
		t->dep = max(depth(t->ch[0]), depth(t->ch[1])) + 1;
		t->size = count(t->ch[0]) + count(t->ch[1]) + 1;
		return t;
	}
	node *rotate(node *t, int b) {
		node *s = t->ch[1 - b];
		t->ch[1 - b] = s->ch[b];
		s->ch[b] = t;
		t = update(t);
		s = update(s);
		return s;
	}
	node *fetch(node *t) {
		if (t == nullptr) return t;
		if (depth(t->ch[0]) - depth(t->ch[1]) == 2) {
			if (depth(t->ch[0]->ch[1]) > depth(t->ch[0]->ch[0])) {
				t->ch[0] = rotate(t->ch[0], 0);
			}
			t = rotate(t, 1);
		}
		else if (depth(t->ch[0]) - depth(t->ch[1]) == -2) {
			if (depth(t->ch[1]->ch[0]) > depth(t->ch[1]->ch[1])) {
				t->ch[1] = rotate(t->ch[1], 1);
			}
			t = rotate(t, 0);
		}
		return t;
	}
	node *insert(node *t, int k, T v) {
		if (t == nullptr) return new node(v);
		int c = count(t->ch[0]), b = (k > c);
		t->ch[b] = insert(t->ch[b], k - (b ? (c + 1) : 0), v);
		update(t);
		return fetch(t);
	}
	node *erase(node *t) {
		if (t == nullptr) return nullptr;
		if (t->ch[0] == nullptr && t->ch[1] == nullptr) {
			delete t;
			return nullptr;
		}
		if (t->ch[0] == nullptr || t->ch[1] == nullptr) {
			node *res = t->ch[t->ch[0] == nullptr];
			delete t;
			return res;
		}
		node *res = new node(find(t->ch[1], 0)->val, t->ch[0], erase(t->ch[1], 0));
		delete t;
		return fetch(update(res));
	}
	node *erase(node *t, int k) {
		if (t == nullptr) return nullptr;
		int c = count(t->ch[0]);
		if (k < c) {
			t->ch[0] = erase(t->ch[0], k);
			t = update(t);
		}
		else if (k > c) {
			t->ch[1] = erase(t->ch[1], k - (c + 1));
			t = update(t);
		}
		else {
			t = erase(t);
		}
		return fetch(t);
	}
	node *find(node *t, int k) {
		if (t == nullptr) return t;
		int c = count(t->ch[0]);
		return k < c ? find(t->ch[0], k) : k == c ? t : find(t->ch[1], k - (c + 1));
	}
	int cnt(node *t, T v) {
		if (t == nullptr) return 0;
		if (t->val < v) return count(t->ch[0]) + 1 + cnt(t->ch[1], v);
		if (t->val == v) return count(t->ch[0]);
		return cnt(t->ch[0], v);
	}
	node *root;
public:
	avlTree() : root(nullptr) {}
	void insert(T val) {
		root = insert(root, cnt(root, val), val);
	}
	void erase(int k) {
		root = erase(root, k);
	}
	T select(int k) {
		return find(root, k)->val;
	}
	int count(T val) {
		return cnt(root, val);
	}
};

void solve(){
    int Q, K;
    cin >> Q >> K;
    avlTree<int> avl;
    REP(i,Q){
        int q, v;
        cin >> q;
        if(q == 1){
            cin >> v;
            avl.insert(v);
        }
        else{
            if(avl.count(INF) < K) cout << -1 << endl;
            else{
                int res = avl.select(K-1);
                cout << res << endl;
                avl.erase(K-1);
            }
        }
    }
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    solve();
    // int T; cin >> T; REP(t,T) solve();
}