oj.uz

Submission #991902

# Submission time Handle Problem Language Result Execution time Memory
991902 2024-06-03T11:10:40 Z onbert Passport (JOI23_passport) C++17
40 / 100
 2000 ms 36156 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int maxn = 2e5 + 5, INF = 1e9;
int Rcost[maxn];
pair<int,int> Lcost[maxn];
bool cmp(int a, int b) {
    return Lcost[a].second < Lcost[b].second;
}

signed main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int n;
    cin >> n;
    pair<int,int> a[n+1];
    vector<pair<int,int>> Lpos[n+1], Rpos[n+1];
    for (int i=1;i<=n;i++) {
        cin >> a[i].first >> a[i].second;
        if (i!=1) Lpos[a[i].first].push_back({a[i].second, i});
        if (i!=n) Rpos[a[i].second].push_back({a[i].first, i});
    }


    for (int i=1;i<=n;i++) sort(Rpos[i].rbegin(), Rpos[i].rend());
    set<int> s;
    for (int i=1;i<=n;i++) s.insert(i);
    vector<int> from = {n}, to;
    int Rcost[n+1];
    for (int i=1;i<=n;i++) Rcost[i] = INF;
    for (int cost=-1; from.size()>0; cost++) {
        for (int u:from) Rcost[u] = max(cost, (int)0);
        for (int u:from) {
            vector<int> del;
            if (s.size()==0) break;
            for (auto r = s.rbegin(); ;r++) {
                int R = *r;
                if (R<u) break;
                while (Rpos[R].size()>0 && Rpos[R].back().first<=u) {
                    to.push_back(Rpos[R].back().second);
                    Rpos[R].pop_back();
                }
                if (Rpos[R].size()==0) del.push_back(R);
                if (R == *s.begin()) break;
            }
            for (int i:del) s.erase(i);
        }
        swap(to, from);
        to.clear();
    }

    for (int i=1;i<=n;i++) sort(Lpos[i].begin(), Lpos[i].end());
    for (int i=1;i<=n;i++) s.insert(i);
    from = {1};
    for (int i=1;i<=n;i++) Lcost[i] = {INF, INF};
    Lcost[1].second = Rcost[1] + 1;
    for (int cost=0; from.size()>0; cost++) {
        sort(from.begin(), from.end(), cmp);
        for (int u:from) Lcost[u].first = cost;
        for (int u:from) {
            vector<int> del;
            for (int L:s) {
                if (L>u) break;
                while (Lpos[L].size()>0 && Lpos[L].back().first>=u) {
                    int v = Lpos[L].back().second;
                    to.push_back(v);
                    Lcost[v].second = min(Rcost[v], Lcost[u].second);
                    Lpos[L].pop_back();
                }
                if (Lpos[L].size()==0) del.push_back(L);
            }
            for (int i:del) s.erase(i);
        }
        swap(to, from);
        to.clear();
    }
    
    int q;
    cin >> q;
    while (q--) {
        int pos;
        cin >> pos;
        if (Lcost[pos].first>=INF || Lcost[pos].second>=INF) cout << -1 << "\n";
        else cout << Lcost[pos].first + Lcost[pos].second << "\n";
    }
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 Execution timed out 2097 ms 36156 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 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 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 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 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 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 5 ms 860 KB Output is correct
17 Correct 2 ms 860 KB Output is correct
18 Correct 10 ms 856 KB Output is correct
19 Correct 9 ms 856 KB Output is correct
20 Correct 2 ms 856 KB Output is correct
21 Correct 5 ms 860 KB Output is correct
22 Correct 1 ms 860 KB Output is correct
23 Correct 4 ms 860 KB Output is correct
24 Correct 11 ms 856 KB Output is correct

Subtask #4
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 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 1 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 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 5 ms 860 KB Output is correct
17 Correct 2 ms 860 KB Output is correct
18 Correct 10 ms 856 KB Output is correct
19 Correct 9 ms 856 KB Output is correct
20 Correct 2 ms 856 KB Output is correct
21 Correct 5 ms 860 KB Output is correct
22 Correct 1 ms 860 KB Output is correct
23 Correct 4 ms 860 KB Output is correct
24 Correct 11 ms 856 KB Output is correct
25 Correct 0 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Incorrect 6 ms 860 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #5
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 Execution timed out 2097 ms 36156 KB Time limit exceeded
5 Halted 0 ms 0 KB -