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답안 #928753

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
928753 2024-02-17T04:20:24 Z juliany2 Passport (JOI23_passport) C++17
100 / 100
 448 ms 51980 KB 
#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(x) (x).begin(), (x).end()

template<class T> struct ST {
    static constexpr T ID = {{{(int) 1e9, 0}, {0, 0}}}; // or whatever ID
    inline T comb(T a, T b) { return {min(a[0], b[0]), max(a[1], b[1])}; } // or whatever function

    int sz;
    vector<T> t;

    void init(int _sz, T val = ID) {
        t.assign((sz = _sz) * 2, ID);
    }
    void init(vector<T> &v) {
        t.resize((sz = v.size()) * 2);
        for (int i = 0; i < sz; ++i)
            t[i + sz] = v[i];
        for (int i = sz - 1; i; --i)
            t[i] = comb(t[i * 2], t[(i * 2) | 1]);
    }
    void upd(int i, T x) {
        for (t[i += sz] = x; i > 1; i >>= 1)
            t[i >> 1] = comb(t[i], t[i ^ 1]);
    }
    T query(int l, int r) {
        T ql = ID, qr = ID;
        for (l += sz, r += sz + 1; l < r; l >>= 1, r >>= 1) {
            if (l & 1) ql = comb(ql, t[l++]);
            if (r & 1) qr = comb(t[--r], qr);
        }
        return comb(ql, qr);
    }
};

template<class T> struct ST_SEG {
    static constexpr T ID = {0, 0}; // or whatever ID
    inline T comb(T a, T b) { return max(a, b); } // or whatever function

    int sz;
    vector<T> t;

    void init(int _sz, T val = ID) {
        t.assign((sz = _sz) * 2, ID);
    }
    void init(vector<T> &v) {
        t.resize((sz = v.size()) * 2);
        for (int i = 0; i < sz; ++i)
            t[i + sz] = v[i];
        for (int i = sz - 1; i; --i)
            t[i] = comb(t[i * 2], t[(i * 2) | 1]);
    }
    void upd(int i, T x) {
        for (t[i += sz] = x; i > 1; i >>= 1)
            t[i >> 1] = comb(t[i], t[i ^ 1]);
    }
    T query(int l, int r) {
        T ql = ID, qr = ID;
        for (l += sz, r += sz + 1; l < r; l >>= 1, r >>= 1) {
            if (l & 1) ql = comb(ql, t[l++]);
            if (r & 1) qr = comb(t[--r], qr);
        }
        return comb(ql, qr);
    }
};

const int N = 2e5 + 7, L = 20;
int n;
int l[N], r[N];
int lift[N][L][2];
int costl[N], costr[N], cost[N];

int bmin(int a, int b) {
    return (l[a] < l[b] ? a : b);
}

int bmax(int a, int b) {
    return (r[a] > r[b] ? a : b);
}

int main() {
    cin.tie(0)->sync_with_stdio(false);

    cin >> n;

    for (int i = 1; i <= n; i++)
        cin >> l[i] >> r[i];

    ST<array<array<int, 2>, 2>> st;
    st.init(n + 1);

    for (int i = 1; i <= n; i++)
        st.upd(i, {{{l[i], i}, {r[i], i}}});

    for (int i = 1; i <= n; i++) {
        lift[i][0][0] = st.query(l[i], r[i])[0][1];
        lift[i][0][1] = st.query(l[i], r[i])[1][1];
    }

    for (int j = 1; j < L; j++) {
        for (int i = 1; i <= n; i++) {
            lift[i][j][0] = bmin(lift[lift[i][j - 1][0]][j - 1][0], lift[lift[i][j - 1][1]][j - 1][0]);
            lift[i][j][1] = bmax(lift[lift[i][j - 1][0]][j - 1][1], lift[lift[i][j - 1][1]][j - 1][1]);
        }
    }

    for (int i = 1; i <= n; i++) {
        int cl = i, cr = i, cost = 0;
        for (int j = L - 1; ~j; j--) {
            int nl = bmin(lift[cl][j][0], lift[cr][j][0]), nr = bmax(lift[cl][j][1], lift[cr][j][1]);
            if (l[nl] != 1)
                cl = nl, cr = nr, cost += 1 << j;
        }

        costl[i] = cost + (l[cl] != 1);
    }

    for (int i = 1; i <= n; i++) {
        int cl = i, cr = i, cost = 0;
        for (int j = L - 1; ~j; j--) {
            int nl = bmin(lift[cl][j][0], lift[cr][j][0]), nr = bmax(lift[cl][j][1], lift[cr][j][1]);
            if (r[nr] != n)
                cl = nl, cr = nr, cost += 1 << j;
        }

        costr[i] = cost + (r[cr] != n);
    }

    ST_SEG<array<int, 2>> seg;
    seg.init(n + 1);

    vector<int> ord(n + 1), vals(n + 1);
    iota(all(ord), 0);
    sort(all(ord), [&](int x, int y) { return l[x] < l[y]; });

    priority_queue<array<int, 2>, vector<array<int, 2>>, greater<>> q;
    for (int i = 1; i <= n; i++) {
        vals[i] = l[ord[i]];
        seg.upd(i, {r[ord[i]], i});

        cost[i] = costl[i] + costr[i] + 1;
        q.push({cost[i], i});
    }

    while (q.size()) {
        auto [c, i] = q.top();
        q.pop();

        int idx = upper_bound(all(vals), i) - vals.begin() - 1;
        while (seg.query(1, idx)[0] >= i) {
            int j = seg.query(1, idx)[1];
            int x = ord[j];

            if (cost[i] + 1 < cost[x]) {
                cost[x] = cost[i] + 1;
                q.push({cost[x], x});
            }
            seg.upd(j, {0, 0});
        }
    }

    for (int i = 1; i <= n; i++)
        if (cost[i] >= (1 << L))
            cost[i] = -1;

    int Q;
    cin >> Q;

    while (Q--) {
        int x;
        cin >> x;

        cout << cost[x] << '\n';
    }

    return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 400 ms 48404 KB Output is correct
5 Correct 351 ms 48576 KB Output is correct
6 Correct 338 ms 48588 KB Output is correct
7 Correct 272 ms 48336 KB Output is correct
8 Correct 215 ms 42148 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6488 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 1 ms 6628 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 2 ms 6488 KB Output is correct

Subtask #3
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6488 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 1 ms 6628 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 2 ms 6488 KB Output is correct
16 Correct 4 ms 7000 KB Output is correct
17 Correct 4 ms 6748 KB Output is correct
18 Correct 4 ms 6748 KB Output is correct
19 Correct 5 ms 6748 KB Output is correct
20 Correct 4 ms 6748 KB Output is correct
21 Correct 4 ms 6748 KB Output is correct
22 Correct 4 ms 6748 KB Output is correct
23 Correct 4 ms 6748 KB Output is correct
24 Correct 4 ms 6820 KB Output is correct

Subtask #4
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6488 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 2 ms 6492 KB Output is correct
9 Correct 2 ms 6492 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 1 ms 6628 KB Output is correct
12 Correct 2 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 6492 KB Output is correct
15 Correct 2 ms 6488 KB Output is correct
16 Correct 4 ms 7000 KB Output is correct
17 Correct 4 ms 6748 KB Output is correct
18 Correct 4 ms 6748 KB Output is correct
19 Correct 5 ms 6748 KB Output is correct
20 Correct 4 ms 6748 KB Output is correct
21 Correct 4 ms 6748 KB Output is correct
22 Correct 4 ms 6748 KB Output is correct
23 Correct 4 ms 6748 KB Output is correct
24 Correct 4 ms 6820 KB Output is correct
25 Correct 1 ms 6492 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 5 ms 6748 KB Output is correct
28 Correct 4 ms 6748 KB Output is correct
29 Correct 4 ms 6748 KB Output is correct
30 Correct 4 ms 6748 KB Output is correct
31 Correct 4 ms 6748 KB Output is correct

Subtask #5
46.0 / 46.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 400 ms 48404 KB Output is correct
5 Correct 351 ms 48576 KB Output is correct
6 Correct 338 ms 48588 KB Output is correct
7 Correct 272 ms 48336 KB Output is correct
8 Correct 215 ms 42148 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6492 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6488 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6492 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct
16 Correct 2 ms 6492 KB Output is correct
17 Correct 2 ms 6492 KB Output is correct
18 Correct 1 ms 6488 KB Output is correct
19 Correct 1 ms 6628 KB Output is correct
20 Correct 2 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6488 KB Output is correct
24 Correct 4 ms 7000 KB Output is correct
25 Correct 4 ms 6748 KB Output is correct
26 Correct 4 ms 6748 KB Output is correct
27 Correct 5 ms 6748 KB Output is correct
28 Correct 4 ms 6748 KB Output is correct
29 Correct 4 ms 6748 KB Output is correct
30 Correct 4 ms 6748 KB Output is correct
31 Correct 4 ms 6748 KB Output is correct
32 Correct 4 ms 6820 KB Output is correct
33 Correct 1 ms 6492 KB Output is correct
34 Correct 1 ms 6492 KB Output is correct
35 Correct 5 ms 6748 KB Output is correct
36 Correct 4 ms 6748 KB Output is correct
37 Correct 4 ms 6748 KB Output is correct
38 Correct 4 ms 6748 KB Output is correct
39 Correct 4 ms 6748 KB Output is correct
40 Correct 448 ms 51980 KB Output is correct
41 Correct 371 ms 49352 KB Output is correct
42 Correct 406 ms 49052 KB Output is correct
43 Correct 375 ms 49016 KB Output is correct
44 Correct 362 ms 49552 KB Output is correct
45 Correct 380 ms 49352 KB Output is correct
46 Correct 112 ms 22232 KB Output is correct
47 Correct 343 ms 48588 KB Output is correct
48 Correct 343 ms 48844 KB Output is correct