結果

問題 No.880 Yet Another Segment Tree Problem
コンテスト
ユーザー hitonanode
提出日時 2019-10-26 18:27:16
言語 C++14
(gcc 13.3.0 + boost 1.89.0)
結果
TLE  
実行時間 -
コード長 6,398 bytes
記録
コンパイル時間 1,101 ms
コンパイル使用メモリ 81,508 KB
実行使用メモリ 86,884 KB
最終ジャッジ日時 2024-09-14 15:05:54
合計ジャッジ時間 20,891 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge6
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 1
other AC * 18 TLE * 1 -- * 18
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 #
raw source code 

#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;
using lint = long long int;
using plint = pair<lint, lint>;
struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); }; } fast_ios_;
#define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++)
#define REP(i, n) FOR(i,0,n)
template<typename T> istream &operator>>(istream &is, vector<T> &vec){ for (auto &v : vec) is >> v; return is; }
///// This part below is only for debug, not used /////
template<typename T> ostream &operator<<(ostream &os, const vector<T> &vec){ os << "["; for (auto v : vec) os << v << ","; os << "]"; return os; }
template<typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa){ os << "(" << pa.first << "," << pa.second << ")"; return os; }
#define dbg(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ") " << __FILE__ << endl;
///// END /////

constexpr lint INF = 1e9 + 100;
struct Node
{
    int n;
    lint max_val;
    lint total_sum;
    lint lca;
    Node(int n = 0, int max_val = 0, lint total_sum = 0, lint lca = 1) : n(n), max_val(max_val), total_sum(total_sum), lca(lca) {}
};

constexpr int UPDATE = 1;
constexpr int GCD = 2;
constexpr int MAXVAL = 3;
constexpr int SUM = 4;

struct LazySegTree
{

    using T_NODE = Node;
    using T_DELAY = plint;
    // using T_QUERY = lint;
    using T_RETVAL = plint;

    T_NODE zero_node = Node();
    T_DELAY zero_delay = plint(0, 0);
    T_RETVAL zero_retval = plint(0, 0);

    int N;
    int head;
    vector<T_NODE> vvalue;
    vector<T_DELAY> vdelay;

    void merge_node(int pos)
    {
        int l = pos * 2 + 1, r = pos * 2 + 2;
        // Here, you have to calculate vvalue[pos] from children (vvalue[l], vvalue[r]),
        // with assumptions `vdelay[pos] = vdelay[l] = vdelay[r] = zero_delay`
        vvalue[pos].n = vvalue[l].n + vvalue[r].n;
        vvalue[pos].max_val = max(vvalue[l].max_val, vvalue[r].max_val);
        vvalue[pos].total_sum = vvalue[l].total_sum + vvalue[r].total_sum;
        vvalue[pos].lca = min(INF, vvalue[l].lca * vvalue[r].lca / __gcd(vvalue[l].lca, vvalue[r].lca));
    }

    void reflect_delay(int pos)
    {
        // Here, you must update vvalue[pos] by reflecting vdelay[pos], without inconsistency
        if (vdelay[pos] == zero_delay) return;
        if (vdelay[pos].second == UPDATE)
        {
            if (pos < head)
            {
                pushdown_dval(pos * 2 + 1, vdelay[pos]);
                pushdown_dval(pos * 2 + 2, vdelay[pos]);
            }
            vvalue[pos] = Node(vvalue[pos].n, vdelay[pos].first, vdelay[pos].first * vvalue[pos].n, vdelay[pos].first);
        }
        if (vdelay[pos].second == GCD)
        {
            if (vvalue[pos].lca < INF and vdelay[pos].first % vvalue[pos].lca == 0)
            {
                // pass
            }
            if (pos < head)
            {
                pushdown_dval(pos * 2 + 1, vdelay[pos]);
                pushdown_dval(pos * 2 + 2, vdelay[pos]);
                reflect_delay(pos * 2 + 1);
                reflect_delay(pos * 2 + 2);
                merge_node(pos);
            }
            else
            {
                lint x = vvalue[pos].total_sum;
                lint xnew = __gcd(x, vdelay[pos].first);
                vvalue[pos] = Node(1, xnew, xnew, xnew);
            }
        }
        vdelay[pos] = zero_delay;
    }

    void pushdown_dval(int child_pos, const T_DELAY &d)
    {
        // operate d to vdelay[child_pos]
        if (d.second == UPDATE or vdelay[child_pos].second == 0) vdelay[child_pos] = d;
        else if (d.second == GCD)
        {
            vdelay[child_pos].first = __gcd(vdelay[child_pos].first, d.first);
        }
    }

    T_RETVAL calc_retval(int pos)
    {
        return make_pair(vvalue[pos].max_val, vvalue[pos].total_sum);
    }
    T_RETVAL merge_retval(const T_RETVAL &l, const T_RETVAL &r)
    {
        return make_pair(max(l.first, r.first), l.second + r.second);
    }

    ////// general description //////
    LazySegTree(const vector<T_NODE> &val_init) : N(val_init.size())
    {
        int N_tmp = 1;
        while (N_tmp < N) N_tmp <<= 1;
        vvalue.assign(N_tmp * 2, zero_node);
        vdelay.assign(N_tmp * 2, zero_delay);
        head = N_tmp - 1;
        copy(val_init.begin(), val_init.end(), vvalue.begin() + head);
        for (int pos = head - 1; pos >= 0; pos--)
        {
            merge_node(pos);
        }
    }

    void update(int begin, int end, T_DELAY delay, int pos=0, int l=0, int r=-1)
    {
        // Operate delay to the node pos
        // After this, vdelay[pos] must be zero
        if (r < 0) r = head + 1;
        if (begin <= l and r <= end) { // Update whole [l, r) by delay
            pushdown_dval(pos, delay);
            reflect_delay(pos);
        }
        else if (begin < r and l < end) { // Update somewhere in [l, r)
            reflect_delay(pos);
            update(begin, end, delay, pos * 2 + 1, l, (l + r) / 2);
            update(begin, end, delay, pos * 2 + 2, (l + r) / 2, r);
            merge_node(pos);
        }
        else reflect_delay(pos);
    }

    T_RETVAL getvalue(int begin, int end, int pos=0, int l=0, int r=-1) // Get value in [begin, end)
    {
        if (r < 0) r = head + 1;
        reflect_delay(pos);
        if (begin <= l and r <= end) return calc_retval(pos);
        else if (begin < r and l < end) {
            T_RETVAL vl = getvalue(begin, end, pos * 2 + 1, l, (l + r) / 2);
            T_RETVAL vr = getvalue(begin, end, pos * 2 + 2, (l + r) / 2, r);
            return merge_retval(vl, vr);
        }
        else return zero_retval;
    }
};

int main()
{
    int N, Q;
    cin >> N >> Q;
    vector<Node> A(N);
    REP(i, N)
    {
        int a;
        cin >> a;
        A[i] = Node(1, a, a, a);
    }
    LazySegTree st(A);
    REP(_, Q)
    {
        int q, l, r;
        cin >> q >> l >> r;
        l--;
        if (q == UPDATE)
        {
            lint x;
            cin >> x;
            st.update(l, r, plint(x, UPDATE));
        }
        if (q == GCD)
        {
            lint x;
            cin >> x;
            st.update(l, r, plint(x, GCD));
        }
        if (q == MAXVAL)
        {
            cout << st.getvalue(l, r).first << endl;
        }
        if (q == SUM)
        {
            cout << st.getvalue(l, r).second << endl;
        }
    }
}
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