#include <bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<(b);++i)
#define erep(i,a,b) for(int i=a;i<=(int)(b);++i)
#define per(i,a,b) for(int i=(a);i>(b);--i)
#define eper(i,a,b) for(int i=(a);i>=b;--i)
#define fore(x, a) for(auto &x : a)
#define pb push_back
#define mp make_pair
#define INF 100100100100
#define inf 2001001001
#define MOD 1000000007
#define ALL(x) begin(x),end(x)
#define F first
#define S second
using namespace std;
using ll = long long;
using pii = pair<int,int>;
using vii = vector<int>;
using vll = vector<ll>;
template<class T>using vv = vector<T>;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; }
template<class T>void show(const vector<T> &a) { for (int i = 0; i < (int)a.size(); ++i) cout << a[i] << (i != (int)a.size()-1 ? " " : "\n"); }
template<class T>T gcd(T a, T b){ return b ? gcd(b, a % b) : a; }
template<class T>T lcm(T a, T b){ return a / gcd(a, b) * b; }
int dy[]={0, 1, -1, 0};
int dx[]={1, 0, 0, -1};

template <class Abel> struct BIT {
    vector<Abel> dat;
    Abel UNITY_SUM = 0;                     // to be set

    /* [1, n] */
    BIT(int n) { init(n); }
    void init(int n) {
        dat.resize(n + 1);
        for (int i = 0; i < (int)dat.size(); ++i) dat[i] = UNITY_SUM;
    }

    /* a is 1-indexed */
    inline void add(int a, Abel x) {
        for (int i = a; i < (int)dat.size(); i += i & -i)
            dat[i] = dat[i] + x;
    }

    /* [1, a], a is 1-indexed */
    inline Abel sum(int a) {
        Abel res = UNITY_SUM;
        for (int i = a; i > 0; i -= i & -i)
            res = res + dat[i];
        return res;
    }

    /* [a, b), a and b are 1-indexed */
    inline Abel sum(int a, int b) {
        return sum(b - 1) - sum(a - 1);
    }

    /* k-th number (k is 0-indexed) */
    int get(long long k) {
        ++k;
        int res = 0;
        int N = 1; while (N < (int)dat.size()) N *= 2;
        for (int i = N / 2; i > 0; i /= 2) {
            if (res + i < (int)dat.size() && dat[res + i] < k) {
                k = k - dat[res + i];
                res = res + i;
            }
        }
        return res + 1;
    }
};

int q, k;
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
    cin >> q >> k;
    BIT<ll> bit(200005);
    vll t(q), v(q), query;
    rep(i, 0, q) {
      cin >> t[i];
      if (t[i] == 1) {
        cin >> v[i];
        query.pb(v[i]);
      }
    }
    sort(ALL(query));
    query.erase(unique(ALL(query)), query.end());
    rep(i, 0, q) {
      if (t[i] == 1) {
        int p = lower_bound(ALL(query), v[i]) - query.begin();
        bit.add(p + 1, 1);
      } else {
        int sz = bit.sum(200005);
        if (k > sz) {
          cout << -1 << endl;
        } else {
          int p = bit.get(k - 1);
          cout << query[p - 1] << endl;
          bit.add(p, -1);
        }
      }
    }
    return 0;
}