답안 #889896

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
889896	2023-12-20T09:21:47 Z	shivensinha4	Passport (JOI23_passport)	C++17	100 / 100	738 ms	91488 KB

passport

#pragma GCC optimize("unroll-loops")
#include "bits/stdc++.h"
#ifdef mlocal
#include "./Competitive-Code-Library/snippets/prettyprint.h"
#endif
using namespace std;
#define for_(i, s, e) for (int i = s; i < (int) e; i++)
#define for__(i, s, e) for (ll i = s; i < e; i++)
typedef long long ll;
typedef vector<int> vi;
typedef array<int, 2> ii;
#define endl '\n'

class SegmentTree {
private:
    vector<vi> tree; vector<ll> raw; int n;

    void update(int i, int j, int v, int l, int r, int p) {
        if (l > j or r < i) return;
        if (l >= i and r <= j) {
            tree[p].push_back(v);
            return;
        }

        int mid = (l + r) / 2;
        int c1 = 2*p+1, c2 = 2*p+2;
        update(i, j, v, l, mid, c1); update(i, j, v, mid+1, r, c2);
    }

    vi get(int i, int l, int r, int p) {
        if (l > i or r < i) return {};

        vi ans = tree[p];
        tree[p].clear();

        if (l != r) {
            int mid = (l + r) / 2;
            int c1 = 2*p+1, c2 = 2*p+2;
            auto al = get(i, l, mid, c1), ar = get(i, mid+1, r, c2);
            ans.insert(ans.end(), al.begin(), al.end());
            ans.insert(ans.end(), ar.begin(), ar.end());
        }

        return ans;
    }

public:
    SegmentTree(int n): n(n) {
        tree.resize(4*n);
    }

    void update(int i, int j, int v) {
        update(i, j, v, 0, n-1, 0);
    }

    vi get(int i) {
        return get(i, 0, n-1, 0);
    }
};


const int INF = 1e9;

int main() {
#ifdef mlocal
    freopen("test.in", "r", stdin);
#endif

    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n; cin >> n;
    vector<ii> seg(n);
    SegmentTree tree(n);
    for_(i, 0, n){
        cin >> seg[i][0] >> seg[i][1], seg[i][0]--, seg[i][1]--;
        tree.update(seg[i][0], seg[i][1], i);
    }

    function<vi(int)> bfs = [&] (int s) {
        vi dist(n, INF);
        dist[s] = 0;

        queue<int> q;
        q.push(s);

        auto curr_tree = tree;

        while (q.size()) {
            auto p = q.front(); q.pop();
            auto adj = curr_tree.get(p);
            for (auto i: adj) if (dist[i] == INF) {
                dist[i] = dist[p] + 1;
                q.push(i);
            }
        }
        return dist;
    };

    vi ans = bfs(0);
    {
        vi ans2 = bfs(n - 1);
        for_(i, 0, n) ans[i] += ans2[i];
    }
    for_(i, 1, n - 1) if (ans[i] < INF) ans[i]--;

    const int pq_size = 2 * n + 10;
    vector<vi> pq(pq_size);
    int dist = 0;

    for_(i, 0, n) if (ans[i] < INF) pq[ans[i]].push_back(i);

    while (true) {
        while (dist < pq_size and pq[dist].empty()) dist++;
        if (dist == pq_size) break;

        int p = pq[dist].back(); pq[dist].pop_back();
        if (dist != ans[p]) continue;

        auto adj = tree.get(p);

        for (auto i: adj) {
            if (ans[i] > ans[p] + 1) {
                ans[i] = ans[p] + 1;
                pq[ans[i]].push_back(i);
            }
        }
    }

    int q; cin >> q;
    while (q--) {
        int p; cin >> p;
        p--;

        cout << (ans[p] >= INF ? -1 : ans[p]) << endl;
    }
}

Subtask #1
6.0 / 6.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	694 ms	78248 KB	Output is correct
5	Correct	538 ms	63988 KB	Output is correct
6	Correct	496 ms	64528 KB	Output is correct
7	Correct	188 ms	44860 KB	Output is correct
8	Correct	96 ms	45812 KB	Output is correct

Subtask #2
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	600 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	1 ms	552 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct

Subtask #3
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	600 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	1 ms	552 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	5 ms	1148 KB	Output is correct
17	Correct	5 ms	1136 KB	Output is correct
18	Correct	5 ms	1136 KB	Output is correct
19	Correct	5 ms	1140 KB	Output is correct
20	Correct	5 ms	1220 KB	Output is correct
21	Correct	4 ms	1136 KB	Output is correct
22	Correct	2 ms	880 KB	Output is correct
23	Correct	5 ms	1136 KB	Output is correct
24	Correct	2 ms	1136 KB	Output is correct

Subtask #4
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	600 KB	Output is correct
5	Correct	0 ms	348 KB	Output is correct
6	Correct	0 ms	348 KB	Output is correct
7	Correct	0 ms	348 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	1 ms	552 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	5 ms	1148 KB	Output is correct
17	Correct	5 ms	1136 KB	Output is correct
18	Correct	5 ms	1136 KB	Output is correct
19	Correct	5 ms	1140 KB	Output is correct
20	Correct	5 ms	1220 KB	Output is correct
21	Correct	4 ms	1136 KB	Output is correct
22	Correct	2 ms	880 KB	Output is correct
23	Correct	5 ms	1136 KB	Output is correct
24	Correct	2 ms	1136 KB	Output is correct
25	Correct	0 ms	348 KB	Output is correct
26	Correct	0 ms	348 KB	Output is correct
27	Correct	8 ms	1144 KB	Output is correct
28	Correct	6 ms	1132 KB	Output is correct
29	Correct	5 ms	1136 KB	Output is correct
30	Correct	4 ms	1136 KB	Output is correct
31	Correct	5 ms	1028 KB	Output is correct

Subtask #5
46.0 / 46.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	348 KB	Output is correct
2	Correct	0 ms	348 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	694 ms	78248 KB	Output is correct
5	Correct	538 ms	63988 KB	Output is correct
6	Correct	496 ms	64528 KB	Output is correct
7	Correct	188 ms	44860 KB	Output is correct
8	Correct	96 ms	45812 KB	Output is correct
9	Correct	0 ms	348 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	0 ms	600 KB	Output is correct
13	Correct	0 ms	348 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	0 ms	348 KB	Output is correct
17	Correct	0 ms	348 KB	Output is correct
18	Correct	0 ms	348 KB	Output is correct
19	Correct	1 ms	552 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	348 KB	Output is correct
22	Correct	1 ms	348 KB	Output is correct
23	Correct	1 ms	348 KB	Output is correct
24	Correct	5 ms	1148 KB	Output is correct
25	Correct	5 ms	1136 KB	Output is correct
26	Correct	5 ms	1136 KB	Output is correct
27	Correct	5 ms	1140 KB	Output is correct
28	Correct	5 ms	1220 KB	Output is correct
29	Correct	4 ms	1136 KB	Output is correct
30	Correct	2 ms	880 KB	Output is correct
31	Correct	5 ms	1136 KB	Output is correct
32	Correct	2 ms	1136 KB	Output is correct
33	Correct	0 ms	348 KB	Output is correct
34	Correct	0 ms	348 KB	Output is correct
35	Correct	8 ms	1144 KB	Output is correct
36	Correct	6 ms	1132 KB	Output is correct
37	Correct	5 ms	1136 KB	Output is correct
38	Correct	4 ms	1136 KB	Output is correct
39	Correct	5 ms	1028 KB	Output is correct
40	Correct	738 ms	82948 KB	Output is correct
41	Correct	566 ms	66568 KB	Output is correct
42	Correct	561 ms	91424 KB	Output is correct
43	Correct	562 ms	91488 KB	Output is correct
44	Correct	521 ms	67032 KB	Output is correct
45	Correct	420 ms	68212 KB	Output is correct
46	Correct	176 ms	24784 KB	Output is correct
47	Correct	563 ms	70252 KB	Output is correct
48	Correct	246 ms	69136 KB	Output is correct

답안 #889896

Compilation message

Subtask #1 6.0 / 6.0

Subtask #2 16.0 / 16.0

Subtask #3 24.0 / 24.0

Subtask #4 8.0 / 8.0

Subtask #5 46.0 / 46.0

Subtask #1
6.0 / 6.0

Subtask #2
16.0 / 16.0

Subtask #3
24.0 / 24.0

Subtask #4
8.0 / 8.0

Subtask #5
46.0 / 46.0