#include <bits/stdc++.h>
#define rep(i, n) for(int(i) = 0; (i) < (n); (i)++)
#define FOR(i, m, n) for(int(i) = (m); (i) < (n); (i)++)
#define ALL(v) (v).begin(), (v).end()
#define LLA(v) (v).rbegin(), (v).rend()
#define SZ(v) (v).size()
#define INT(...)                                                               \
    int __VA_ARGS__;                                                           \
    read(__VA_ARGS__)
#define LL(...)                                                                \
    ll __VA_ARGS__;                                                            \
    read(__VA_ARGS__)
#define DOUBLE(...)                                                            \
    double __VA_ARGS__;                                                        \
    read(__VA_ARGS__)
#define CHAR(...)                                                              \
    char __VA_ARGS__;                                                          \
    read(__VA_ARGS__)
#define STRING(...)                                                            \
    string __VA_ARGS__;                                                        \
    read(__VA_ARGS__)
#define VEC(type, name, size)                                                  \
    vector<type> name(size);                                                   \
    read(name)
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using Graph = vector<vector<int>>;
template <typename T> struct edge {
    int to;
    T cost;
    edge(int t, T c) : to(t), cost(c) {}
};
template <typename T> using WGraph = vector<vector<edge<T>>>;
const int INF = 1 << 30;
const ll LINF = 1LL << 60;
const int MOD = 1e9 + 7;
template <class T> inline vector<T> make_vec(size_t a, T val) {
    return vector<T>(a, val);
}
template <class... Ts> inline auto make_vec(size_t a, Ts... ts) {
    return vector<decltype(make_vec(ts...))>(a, make_vec(ts...));
}

void read() {}
template <class T> inline void read(T &a) { cin >> a; }
template <class T, class S> inline void read(pair<T, S> &p) {
    read(p.first), read(p.second);
}
template <class T> inline void read(vector<T> &v) {
    for(auto &a : v)
        read(a);
}
template <class Head, class... Tail>
inline void read(Head &head, Tail &...tail) {
    read(head), read(tail...);
}
template <class T> inline void chmax(T &a, T b) { (a < b ? a = b : a); }
template <class T> inline void chmin(T &a, T b) { (a > b ? a = b : a); }

/**
 * @brief 0-indexed (Internally 1-indexed) Fenwick Tree
 *
 * @tparam T Universal set.
 */
template <typename T> struct FenwickTree {
    int n;
    vector<T> dat;

    FenwickTree(int n) : n(++n), dat(n, 0) {}

    void add(int i, T x) {
        for(++i; i < n; i += i & -i)
            dat[i] = dat[i] + x;
    }

    /**
     * @brief Sum values in [0,i]
     *
     * @param i Right end of interval. Note that closed-interval [0,i].
     * @return T Summation values in [0,i].
     */
    T sum(int i) {
        T res = 0;
        for(++i; i > 0; i -= i & -i) {
            res = res + dat[i];
        }
        return res;
    }

    /**
     * @brief Sum values in [l,r]
     *
     * @param l Left end of interval.
     * @param r Right end of interval.
     * @return T Summation values in [l,r]
     */
    T sum(int l, int r) { return sum(r) - sum(l - 1); }

    /**
     * @brief Sum all values.
     *
     * @return T Summation values.
     */
    T sumAll() { return sum(n - 1); }

    /**
     * @brief If regard as histogram of elements, get k-th element.
     *
     * @param k Get k-th element.
     * @return int Index to which k-th element belongs.
     */
    int get(T k) {
        ++k;
        int res = 0;
        int N = 1;
        while(N < n)
            N *= 2;
        for(int i = N / 2; i > 0; i /= 2) {
            if(res + i < n && dat[res + i] < k) {
                k = k - dat[res + i];
                res = res + i;
            }
        }
        return res + 1;
    }
};

/**
 * @brief 座標圧縮
 *
 * @tparam T データ型
 * @param X 圧縮する数列 副作用により圧縮後の値が入る
 * @return std::vector<T> ソートして重複を除去した元数列
 */
template <typename T> std::vector<T> compress(std::vector<T> &X) {
    std::vector<T> vals = X;
    std::sort(vals.begin(), vals.end());
    vals.erase(unique(vals.begin(), vals.end()), vals.end());
    for(int i = 0; i < X.size(); i++) {
        X[i] = lower_bound(vals.begin(), vals.end(), X[i]) - vals.begin();
    }
    return vals;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    INT(q, k);
    FenwickTree<ll> bit(200010);
    vector<pll> query(q);
    vector<ll> vals;
    rep(i, q) {
        INT(a);
        if(a == 1) {
            LL(v);
            query[i] = {a, v};
            vals.emplace_back(v);
        } else {
            query[i] = {a, 0};
        }
    }
    auto dict = compress(vals);
    int now = 0;
    for(auto [a, v] : query) {
        if(a == 1) {
            bit.add(vals[now++], 1);
        } else {
            if(bit.sumAll() < k) {
                cout << -1 << endl;
            } else {
                int val = bit.get(k - 1);
                cout << dict[val - 1] << endl;
                bit.add(val - 1, -1);
            }
        }
    }
}