結果

問題 No.759 悪くない忘年会にしような！
ユーザー kimiyuki
提出日時 2018-12-07 01:16:05
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
WA  
実行時間 -
コード長 2,855 bytes
コンパイル時間 2,071 ms
コンパイル使用メモリ 206,140 KB
最終ジャッジ日時 2025-01-06 18:32:48
ジャッジサーバーID
（参考情報） 		judge3 / judge4
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 * 3
other AC * 34 WA * 30
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ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
#define REP(i, n) for (int i = 0; (i) < (int)(n); ++ (i))
#define REP3(i, m, n) for (int i = (m); (i) < (int)(n); ++ (i))
#define REP_R(i, n) for (int i = int(n) - 1; (i) >= 0; -- (i))
#define ALL(x) begin(x), end(x)
using namespace std;
template <class Monoid>
struct segment_tree {
    typedef typename Monoid::underlying_type underlying_type;
    int n;
    vector<underlying_type> a;
    const Monoid mon;
    segment_tree() = default;
    segment_tree(int a_n, underlying_type initial_value = Monoid().unit(), Monoid const & a_mon = Monoid()) : mon(a_mon) {
        n = 1; while (n < a_n) n *= 2;
        a.resize(2 * n - 1, mon.unit());
        fill(a.begin() + (n - 1), a.begin() + ((n - 1) + a_n), initial_value); // set initial values
        REP_R (i, n - 1) a[i] = mon.append(a[2 * i + 1], a[2 * i + 2]); // propagate initial values
    }
    void point_set(int i, underlying_type z) { // 0-based
        assert (0 <= i and i <= n);
        a[i + n - 1] = z;
        for (i = (i + n) / 2; i > 0; i /= 2) { // 1-based
            a[i - 1] = mon.append(a[2 * i - 1], a[2 * i]);
        }
    }
    underlying_type range_concat(int l, int r) { // 0-based, [l, r)
        assert (0 <= l and l <= r and r <= n);
        underlying_type lacc = mon.unit(), racc = mon.unit();
        for (l += n, r += n; l < r; l /= 2, r /= 2) { // 1-based loop, 2x faster than recursion
            if (l % 2 == 1) lacc = mon.append(lacc, a[(l ++) - 1]);
            if (r % 2 == 1) racc = mon.append(a[(-- r) - 1], racc);
        }
        return mon.append(lacc, racc);
    }
};
struct max_monoid {
    typedef int underlying_type;
    int unit() const { return INT_MIN; }
    int append(int a, int b) const { return max(a, b); }
};
vector<int> solve(int n, vector<int> const & a, vector<int> const & b, vector<int> const & c) {
    vector<int> order(n);
    iota(ALL(order), 0);
    sort(ALL(order), [&](int i, int j) { return a[i] > a[j]; });
    vector<int> answer;
    int max_b = *max_element(ALL(b));
    segment_tree<max_monoid> segtree(max_b + 1);
    for (int l = 0; l < n; ) {
        int r = l + 1;
        while (r < n and a[order[r]] == a[order[l]]) ++ r;
        REP3 (m, l, r) {
            int i = order[m];
            if (segtree.range_concat(b[i], b[i] + 1) > c[i]) continue;
            if (segtree.range_concat(b[i] + 1, max_b + 1) >= c[i]) continue;
            answer.push_back(i);
        }
        REP3 (m, l, r) {
            int i = order[m];
            segtree.point_set(b[i], max(c[i], segtree.range_concat(b[i], b[i] + 1)));
        }
        l = r;
    }
    sort(ALL(answer));
    return answer;
}
int main() {
    int n; cin >> n;
    vector<int> a(n), b(n), c(n);
    REP (i, n) cin >> a[i] >> b[i] >> c[i];
    for (int i : solve(n, a, b, c)) {
        cout << i + 1 << endl;
    }
    return 0;
}
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