#include <stdio.h>
#include <stdlib.h>

unsigned int rand_int(void) {
  static unsigned int x = 123456789, y = 362436069, z = 521288629, w = 88675123;
  unsigned int t;
  t = (x ^ (x << 11));
  x = y;
  y = z;
  z = w;
  return (w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)));
}

typedef long long i64;

typedef struct Node {
  i64 val;
  int size;
  struct Node *left;
  struct Node *right;
} Node;
Node *create_node(i64 val) {
  Node *ret = (Node *)malloc(sizeof(Node));
  ret->val = val;
  ret->size = 1;
  ret->left = ret->right = NULL;
  return ret;
}

typedef struct Pair {
  Node *left, *right;
} Pair;
Pair make_pair(Node *left, Node *right) {
  Pair pair = {left, right};
  return pair;
}

int size(Node *node) { return node == NULL ? 0 : node->size; }

Node *update(Node *node) {
  node->size = 1 + size(node->left) + size(node->right);
  return node;
}

// left内の最大 <= right内の最小
Node *merge(Node *left, Node *right) {
  if (left == NULL) {
    return right;
  } else if (right == NULL) {
    return left;
  }
  // sizeの和は一定
  if ((int)rand_int() % (size(left) + size(right)) < size(left)) {
    left->right = merge(left->right, right);
    return update(left);
  } else {
    right->left = merge(left, right->left);
    return update(right);
  }
}

// 小さいのk個を左側に、それ以外を右側に
Pair split(Node *root, int k) {
  if (root == NULL) return make_pair(root, root);
  if (k <= size(root->left)) { // root+右部分木はぜんぶ右側
    Pair nodes = split(root->left, k);
    root->left = nodes.right;
    return make_pair(nodes.left, update(root));
  } else { // root+左部分木はぜんぶ左側
    Pair nodes = split(root->right, k - size(root->left) - 1);
    root->right = nodes.left;
    return make_pair(update(root), nodes.right);
  }
}

// xより小さい数の個数
int lower_bound(Node *root, i64 x) {
  if (root == NULL) return 0;
  if (x <= root->val) {
    // 右部分木には1個もない
    return lower_bound(root->left, x);
  } else {
    // root+左部分木ぜんぶ は確定
    return lower_bound(root->right, x) + size(root->left) + 1;
  }
}

int exist(Node *root, i64 x) {
  if (root == NULL) return 0;
  if (x == root->val) {
    return 1;
  } else if (x < root->val) {
    return exist(root->left, x);
  } else {
    return exist(root->right, x);
  }
}

Node *insert(Node *root, i64 x) {
  Pair nodes = split(root, lower_bound(root, x));
  return merge(merge(nodes.left, create_node(x)), nodes.right);
}

Node *erase(Node *root, i64 x) {
  if (!exist(root, x)) return root;
  Pair nodes = split(root, lower_bound(root, x));
  // xはnodes.rightに含まれる(しかもroot?)
  return merge(nodes.left, split(nodes.right, 1).right);
}

// k番目に小さいnode
Node *get_kth(Node *root, int k) {
  if (root == NULL) return NULL;
  int left_size = size(root->left);
  if (left_size + 1 == k) {
    return root; // 右の部分木にroot->valと等しいのはあるかもしれない
  } else if (left_size + 1 > k) {
    return get_kth(root->left, k);
  } else {
    return get_kth(root->right, k - left_size - 1);
  }
}

int main(void) {

  Node *root = NULL;
  int q, k;
  scanf("%d %d", &q, &k);
  while (q--) {
    int type;
    scanf("%d", &type);
    if (type == 1) {
      i64 x;
      scanf("%lld", &x);
      root = insert(root, x);
    } else {
      if (size(root) < k) {
        printf("-1\n");
      } else {
        Node *ret = get_kth(root, k);
        printf("%lld\n", ret->val);
        root = erase(root, ret->val);
      }
    }
  }

  return 0;
}