結果

問題 No.649 ここでちょっとQK！
ユーザー akakimidoriakakimidori
提出日時 2019-05-26 20:06:32
言語 C
(gcc 12.3.0)
結果
AC  
実行時間 127 ms / 3,000 ms
コード長 3,271 bytes
コンパイル時間 208 ms
コンパイル使用メモリ 33,536 KB
実行使用メモリ 11,264 KB
最終ジャッジ日時 2024-09-17 15:22:00
合計ジャッジ時間 3,745 ms
ジャッジサーバーID
（参考情報） 		judge6 / judge2
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 1 ms
6,812 KB
testcase_01 AC 0 ms
6,944 KB
testcase_02 AC 1 ms
6,944 KB
testcase_03 AC 19 ms
6,940 KB
testcase_04 AC 110 ms
11,136 KB
testcase_05 AC 101 ms
11,264 KB
testcase_06 AC 103 ms
11,136 KB
testcase_07 AC 1 ms
6,940 KB
testcase_08 AC 1 ms
6,940 KB
testcase_09 AC 1 ms
6,940 KB
testcase_10 AC 0 ms
6,944 KB
testcase_11 AC 1 ms
6,940 KB
testcase_12 AC 56 ms
6,940 KB
testcase_13 AC 54 ms
6,940 KB
testcase_14 AC 55 ms
6,944 KB
testcase_15 AC 58 ms
6,944 KB
testcase_16 AC 53 ms
6,944 KB
testcase_17 AC 63 ms
6,940 KB
testcase_18 AC 68 ms
6,944 KB
testcase_19 AC 77 ms
7,040 KB
testcase_20 AC 83 ms
7,424 KB
testcase_21 AC 89 ms
7,680 KB
testcase_22 AC 94 ms
8,192 KB
testcase_23 AC 103 ms
8,448 KB
testcase_24 AC 114 ms
8,832 KB
testcase_25 AC 119 ms
9,216 KB
testcase_26 AC 127 ms
9,600 KB
testcase_27 AC 1 ms
6,944 KB
testcase_28 AC 1 ms
6,940 KB
testcase_29 AC 1 ms
6,940 KB
testcase_30 AC 55 ms
6,944 KB
testcase_31 AC 64 ms
6,940 KB
testcase_32 AC 1 ms
6,940 KB
testcase_33 AC 1 ms
6,944 KB
testcase_34 AC 1 ms
6,940 KB
testcase_35 AC 1 ms
6,940 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

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

typedef int32_t i32;
typedef int64_t i64;

typedef struct WBT_node {
  i64 val;
  i32 size;
  struct WBT_node *left;
  struct WBT_node *right;
} node;

i32 get_size (const node *t) {
  return t == NULL ? 0 : t->size;
}

node* new_node (const i64 val) {
  node *t = (node *) calloc (1, sizeof (node));
  *t = (node) {val, 1, NULL, NULL};
  return t;
}

void free_node (node *t) {
  if (t == NULL) return;
  free_node (t->left);
  free_node (t->right);
  free (t);
}

void update (node *t) {
  if (t == NULL) return;
  t->size = 1 + get_size (t->left) + get_size (t->right);
}

i32 get_bias (node *t, i32 b) {
  if (t == NULL) return 0;
  i32 l = get_size (t->left) + 1;
  i32 r = get_size (t->right) + 1;
  if (b * l >= r && l <= b * r) return 0;
  return b * l < r ? -1 : 1;
}

node* left_rotate (node *u) {
  node *v = u->right;
  u->right = v->left;
  v->left = u;
  update (u);
  update (v);
  return v;
}

node* right_rotate (node *v) {
  node *u = v->left;
  v->left = u->right;
  u->right = v;
  update (v);
  update (u);
  return u;
}

node* balance (node *t) {
  i32 b = get_bias (t, 3);
  if (b < 0) {
    if (get_bias (t->right, 2) > 0) t->right = right_rotate (t->right);
    t = left_rotate (t);
  } else if (b > 0) {
    if (get_bias (t->left, 2) < 0) t->left = left_rotate (t->left);
    t = right_rotate (t);
  }
  return t;
}

node* join (node *l, node *m, node *r) {
  i32 a = get_size (l) + 1;
  i32 b = get_size (r) + 1;
  if (3 * a >= b && a <= 3 * b) {
    m->left = l;
    m->right = r;
    update (m);
    return m;
  }
  if (3 * a < b) {
    r->left = join (l, m, r->left);
    update (r);
    return balance (r);
  } else {
    l->right = join (l->right, m, r);
    update (l);
    return balance (l);
  }
}

node* merge (node *l, node *r) {
  if (l == NULL) return r;
  if (r == NULL) return l;
  if (get_size (l) <= get_size (r)) {
    r->left = merge (l, r->left);
    update (r);
    return balance (r);
  } else {
    l->right = merge (l->right, r);
    update (l);
    return balance (l);
  }
}

void split (node *t, i32 k, node **x, node **y) {
  //assert (0 <= k && k <= get_size (t));
  if (k == 0) {
    *x = NULL;
    *y = t;
    return;
  }
  if (get_size (t->left) + 1 <= k) {
    split (t->right, k - 1 - get_size (t->left), x, y);
    *x = join (t->left, t, *x);
  } else {
    split (t->left, k, x, y);
    *y = join (*y, t, t->right);
  }
}

node* insert (node *t, i64 val) {
  if (t == NULL) return new_node (val);
  if (val < t->val) {
    t->left = insert (t->left, val);
  } else {
    t->right = insert (t->right, val);
  }
  update (t);
  return balance (t);
}

void run (void) {
  i32 q, k;
  scanf ("%" SCNi32 "%" SCNi32, &q, &k);
  node *set = NULL;
  while (q--) {
    i32 op;
    scanf ("%" SCNi32, &op);
    if (op == 1) {
      i64 v;
      scanf ("%" SCNi64, &v);
      set = insert (set, v);
    } else if (get_size (set) < k) {
      puts ("-1");
    } else {
      node *z[4] = {NULL, NULL, NULL, NULL};
      split (set, k, z + 0, z + 1);
      split (z[0], k - 1, z + 2, z + 3);
      printf ("%" PRIi64 "\n", z[3]->val);
      free_node (z[3]);
      set = merge (z[2], z[1]);
    }
  }
}

int main (void) {
  run();
  return 0;
}
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