結果
| 問題 | No.649 ここでちょっとQK! |
| コンテスト | |
| ユーザー |
akakimidori
|
| 提出日時 | 2019-05-28 03:23:35 |
| 言語 | C (gcc 13.3.0) |
| 結果 |
AC
|
| 実行時間 | 130 ms / 3,000 ms |
| コード長 | 3,560 bytes |
| 記録 | |
| コンパイル時間 | 257 ms |
| コンパイル使用メモリ | 33,232 KB |
| 実行使用メモリ | 11,264 KB |
| 最終ジャッジ日時 | 2024-09-17 15:37:26 |
| 合計ジャッジ時間 | 3,762 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 32 |
ソースコード
#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) {
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);
}
i64 search (node *t, i32 k) {
i32 c = get_size (t->left);
if (k <= c) return search (t->left, k);
k -= c;
if (k == 1) return t->val;
return search (t->right, k - 1);
}
node* erase (node *t, i64 val) {
if (t->val == val) {
node *r = merge (t->left, t->right);
free (t);
return r;
}
if (val < t->val) {
t->left = erase (t->left, val);
} else {
t->right = erase (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 {
i64 v = search (set, k);
printf ("%" PRIi64 "\n", v);
set = erase (set, v);
}
}
}
int main (void) {
run();
return 0;
}
akakimidori