#343077 (C++14) No.649 ここでちょっとQK！

• 問題: No.649 ここでちょっとQK！
• ユーザー: ミドリムシ
• 提出日時: 2019-04-27 01:02:25
• 言語: C++14 (gcc 12.3.0 + boost 1.83.0)
• 結果: AC
• 実行時間: 401 ms / 3,000 ms
• コード長: 6,113 bytes
• コンパイル時間: 831 ms
• コンパイル使用メモリ: 76,464 KB
• 実行使用メモリ: 12,800 KB
• 最終ジャッジ日時: 2024-05-04 04:03:43
• 合計ジャッジ時間: 8,029 ms
• ジャッジサーバーID （参考情報）: judge4 / judge1

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	2 ms; 6,816 KB
testcase_01	AC	1 ms; 6,816 KB
testcase_02	AC	2 ms; 6,816 KB
testcase_03	AC	296 ms; 6,812 KB
testcase_04	AC	193 ms; 12,800 KB
testcase_05	AC	191 ms; 12,800 KB
testcase_06	AC	196 ms; 12,672 KB
testcase_07	AC	2 ms; 6,944 KB
testcase_08	AC	2 ms; 6,940 KB
testcase_09	AC	1 ms; 6,940 KB
testcase_10	AC	1 ms; 6,944 KB
testcase_11	AC	1 ms; 6,940 KB
testcase_12	AC	178 ms; 7,680 KB
testcase_13	AC	181 ms; 7,680 KB
testcase_14	AC	175 ms; 7,552 KB
testcase_15	AC	192 ms; 7,808 KB
testcase_16	AC	180 ms; 7,808 KB
testcase_17	AC	206 ms; 8,064 KB
testcase_18	AC	231 ms; 8,448 KB
testcase_19	AC	249 ms; 8,960 KB
testcase_20	AC	269 ms; 9,344 KB
testcase_21	AC	287 ms; 9,856 KB
testcase_22	AC	335 ms; 10,240 KB
testcase_23	AC	333 ms; 10,624 KB
testcase_24	AC	361 ms; 11,008 KB
testcase_25	AC	381 ms; 11,520 KB
testcase_26	AC	401 ms; 11,776 KB
testcase_27	AC	3 ms; 6,944 KB
testcase_28	AC	3 ms; 6,940 KB
testcase_29	AC	2 ms; 6,940 KB
testcase_30	AC	149 ms; 7,680 KB
testcase_31	AC	150 ms; 7,680 KB
testcase_32	AC	1 ms; 6,944 KB
testcase_33	AC	2 ms; 6,944 KB
testcase_34	AC	1 ms; 6,940 KB
testcase_35	AC	2 ms; 6,940 KB

ソースコード

#include <iostream>
using namespace std;

template<class VAL> struct RBST {
    VAL SUM_UNITY = 0;                              // to be set

    unsigned int randInt() {
        static unsigned int tx = 123456789, ty = 362436069, tz = 521288629, tw = 88675123;
        unsigned int tt = (tx ^ (tx << 11));
        tx = ty; ty = tz; tz = tw;
        return (tw = (tw ^ (tw >> 19)) ^ (tt ^ (tt >> 8)));
    }

    struct NODE {
        NODE *left, *right;
        VAL val;                        // the value of the node
        int size;                       // the size of the subtree 
        VAL sum;                        // the value-sum of the subtree

        NODE() : val(SUM_UNITY), size(1), sum(SUM_UNITY) {
            left = right = NULL;
        }

        NODE(VAL v) : val(v), size(1), sum(v) {
            left = right = NULL;
        }

        /* additional update */
        inline void update() {

        }

        /* additional lazy-propagation */
        inline void push() {

            /* ex: reverse */
            /*
            if (this->rev) {
            swap(this->left, this->right);
            if (this->left) this->left->rev ^= true;
            if (this->right) this->right->rev ^= true;
            this->rev = false;
            }
            */
        }
    };


    ///////////////////////
    // root
    ///////////////////////

    NODE* root;
    RBST() : root(NULL) { }
    RBST(NODE* node) : root(node) { }


    ///////////////////////
    // basic operations
    ///////////////////////

    /* size */
    inline int size(NODE *node) {
        return !node ? 0 : node->size;
    }
    inline int size() {
        return this->size(this->root);
    }

    /* sum */
    inline VAL sum(NODE *node) {
        return !node ? SUM_UNITY : node->sum;
    }
    inline VAL sum() {
        return this->sum(this->root);
    }

    /* update, push */
    inline NODE* update(NODE *node) {
        node->size = size(node->left) + size(node->right) + 1;
        node->sum = sum(node->left) + sum(node->right) + node->val;
        node->update();
        return node;
    }

    inline void push(NODE *node) {
        if (!node) return;
        node->push();
    }

    /* lower_bound */
    inline int lowerBound(NODE *node, VAL val) {
        push(node);
        if (!node) return 0;
        if (val <= node->val) return lowerBound(node->left, val);
        else return size(node->left) + lowerBound(node->right, val) + 1;
    }
    inline int lowerBound(VAL val) {
        return this->lowerBound(this->root, val);
    }

    /* upper_bound */
    inline int upperBound(NODE *node, VAL val) {
        push(node);
        if (!node) return 0;
        if (val >= node->val) return size(node->left) + upperBound(node->right, val) + 1;
        else return upperBound(node->left, val);
    }
    inline int upperBound(VAL val) {
        return this->upperBound(this->root, val);
    }

    /* count */
    inline int count(VAL val) {
        return upperBound(val) - lowerBound(val);
    }

    /* get --- k: 0-index */
    inline VAL get(NODE *node, int k) {
        push(node);
        if (!node) return -1;
        if (k == size(node->left)) return node->val;
        if (k < size(node->left)) return get(node->left, k);
        else return get(node->right, k - size(node->left) - 1);
    }
    inline VAL get(int k) {
        return get(this->root, k);
    }


    ///////////////////////
    // merge-split
    ///////////////////////

    NODE* merge(NODE *left, NODE *right) {
        push(left);
        push(right);
        if (!left || !right) {
            if (left) return left;
            else return right;
        }
        if (randInt() % (left->size + right->size) < left->size) {
            left->right = merge(left->right, right);
            return update(left);
        }
        else {
            right->left = merge(left, right->left);
            return update(right);
        }
    }
    void merge(RBST add) {
        this->root = this->merge(this->root, add.root);
    }
    pair<NODE*, NODE*> split(NODE* node, int k) { // [0, k), [k, n)
        push(node);
        if (!node) return make_pair(node, node);
        if (k <= size(node->left)) {
            pair<NODE*, NODE*> sub = split(node->left, k);
            node->left = sub.second;
            return make_pair(sub.first, update(node));
        }
        else {
            pair<NODE*, NODE*> sub = split(node->right, k - size(node->left) - 1);
            node->right = sub.first;
            return make_pair(update(node), sub.second);
        }
    }
    RBST split(int k) {
        pair<NODE*, NODE*> sub = split(this->root, k);
        this->root = sub.first;
        return RBST(sub.second);
    }


    ///////////////////////
    // insert-erase
    ///////////////////////

    void insert(const VAL val) {
        pair<NODE*, NODE*> sub = this->split(this->root, this->lowerBound(val));
        this->root = this->merge(this->merge(sub.first, new NODE(val)), sub.second);
    }

    void erase(const VAL val) {
        if (!this->count(val)) return;
        pair<NODE*, NODE*> sub = this->split(this->root, this->lowerBound(val));
        this->root = this->merge(sub.first, this->split(sub.second, 1).second);
    }


    ///////////////////////
    // debug
    ///////////////////////

    void print(NODE *node) {
        if (!node) return;
        push(node);
        print(node->left);
        cout << node->val << " ";
        print(node->right);
    }
    void print() {
        cout << "{";
        print(this->root);
        cout << "}" << endl;
    }
};

int main() {
    RBST<long long> S;
    int Q, K;
    cin >> Q >> K;
    for (int i = 0; i < Q; ++i) {
        int T;
        cin >> T;
        if (T == 1) {
            long long val;
            cin >> val;
            S.insert(val);
        }
        else {
            if (S.size() < K) {
                cout << -1 << endl;
                continue;
            }
            long long res = S.get(K - 1);
            cout << res << endl;
            S.erase(res);
        }
        //S.print();
    }
}