#include <stdio.h>
#include <queue>

using namespace std;

template <class T>
struct KQue {
    priority_queue<T> max_q;
    priority_queue<T, vector<T>, greater<T>> min_q;
    size_t K;
    KQue(size_t k): K(k) {}
    void push(T v) {
        if (max_q.size() < K) {
            max_q.push(v); return;
        }
        T ma_v = max_q.top();
        if (ma_v > v) {
            max_q.pop();
            max_q.push(v);
            min_q.push(ma_v);
        } else {
            min_q.push(v);
        }
    }
    T get() {
        if (max_q.size() < K) return -1;
        T ma_v = max_q.top(); max_q.pop();
        if (min_q.size() != 0) {
            T mi_v = min_q.top(); min_q.pop();
            max_q.push(mi_v);
        }
        return ma_v;
    }
};

int main() {
    int Q, K;
    scanf("%d%d", &Q, &K);
    KQue<long long int> kque(K);
    
    for(int i = 0; i < Q; i++) {
        int q; scanf("%d", &q);
        if (q == 1) {
            long long int v; scanf("%lld", &v);
            kque.push(v);
        } else {
            printf("%lld\n", kque.get());
        }
    }
    return 0;
}