oj.uz

Submission #1019743

# Submission time Handle Problem Language Result Execution time Memory
1019743 2024-07-11T08:31:09 Z Pacybwoah Tourism (JOI23_tourism) C++17
5 / 100
 106 ms 604 KB 
#include<iostream>
#include<vector>
#include<algorithm>
#include<queue>
#include<cassert>
#include<set>
#include<utility>
using namespace std;
const int k = 300;
vector<vector<int>> graph;
vector<int> in, dep, pos;
vector<vector<int>> anc;
int tst = 0;
void dfs(int node, int parent){
    in[++tst] = node;
    pos[node] = tst;
    anc[0][node] = parent;
    dep[node] = dep[parent] + 1;
    for(auto x: graph[node]){
        if(x == parent) continue;
        dfs(x, node);
    }
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, m, q;
    cin >> n >> m >> q;
    assert(n <= 2000);
    in.resize(n + 1);
    dep.resize(n + 1);
    pos.resize(n + 1);
    anc.resize(18, vector<int>(n + 1));
    graph.resize(n + 1);
    int a, b;
    for(int i = 1; i < n; i++){
        cin >> a >> b;
        graph[a].push_back(b);
        graph[b].push_back(a);
    }
    dfs(1, 1);
    vector<int> vec(m + 1);
    for(int i = 1; i <= m; i++) cin >> vec[i], vec[i] = pos[vec[i]];
    vector<int> ans(q);
    for(int i = 1; i < 18; i++){
        for(int j = 1; j <= n; j++){
            anc[i][j] = anc[i - 1][anc[i - 1][j]];
        }
    }
    auto lca = [&](int u, int v){
        u = in[u], v = in[v];
        if(dep[u] < dep[v]) swap(u, v);
        for(int i = 17; i >= 0; i--){
            if((1 << i) & (dep[u] - dep[v])) u = anc[i][u];
        }
        for(int i = 17; i >= 0; i--){
            if(anc[i][u] != anc[i][v]) u = anc[i][u], v = anc[i][v];
        }
        if(u != v) u = anc[0][u], v = anc[0][v];
        return pos[u];
    };
    auto dist = [&](int u, int v){
        return dep[in[u]] + dep[in[v]] - 2 * dep[in[lca(u, v)]];
    };
    auto left = [&](int aa, int bb, int cc){
        return (dist(aa, bb) + dist(aa, cc) - dist(bb, cc)) / 2;
    };
    vector<vector<pair<pair<int, int>, int>>> queries(m / k + 1);
    for(int i = 0; i < q; i++){
        cin >> a >> b;
        queries[(a - 1) / k].push_back(make_pair(make_pair(a, b), i));
    }
    auto cmp = [&](pair<pair<int, int>, int> c, pair<pair<int, int>, int> d){
        return c.first.second < d.first.second;
    };
    for(int i = 0; i <= m / k; i++) sort(queries[i].begin(), queries[i].end(), cmp);
    int lb = 0, now_lca = -1;
    for(auto &x: queries){
        lb += k;
        multiset<int> s;
        int cnt = 0, rb = lb, last_cnt = 0;
        auto add = [&](int node){
            if(s.empty()){
                now_lca = node;
                s.insert(node);
                cnt = 1;
                return;
            }
            auto iter = s.upper_bound(node);
            if(iter != s.end() && (*iter) == node){
                s.insert(node);
                return;
            }
            if(iter == s.begin()){
                cnt += left(node, (*iter), now_lca);
                now_lca = lca(node, now_lca);
                s.insert(node);
                return;
            }
            if(iter == s.end()){
                iter = prev(iter);
                //cout << node << " " << left(node, (*iter), now_lca) << "\n";
                //cout << node << " " << (*iter) << " " << now_lca << "\n";
                cnt += left(node, (*iter), now_lca);
                now_lca = lca(node, now_lca);
                s.insert(node);
                return;
            }
            int bf = (*prev(iter)), gf = (*iter);
            cnt += left(node, bf, gf);
            s.insert(node);
        };
        for(auto &y: x){
            a = y.first.first, b = y.first.second;
            while(b > rb){
                rb++;
                add(vec[rb]);
            }
            last_cnt = cnt;
            for(int i = a; i <= min(b, lb); i++){
                add(vec[i]);
            }
            ans[y.second] = cnt;
            cnt = last_cnt;
            for(int i = a; i <= min(b, lb); i++){
                s.erase(s.find(vec[i]));
            }
            //cout << cnt << "\n";
        }
    }
    for(int i = 0; i < q; i++) cout << ans[i] << "\n";
}
// g++ -std=c++17 pC.cpp -o run -fsanitize=undefined -fsanitize=address -Wall -Wextra -Wshadow
/*
7 6 2
1 2
1 3
2 4
2 5
3 6
3 7
2 3 6 4 5 7
1 3
4 6
*/

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 452 KB Output is correct
4 Correct 9 ms 348 KB Output is correct
5 Correct 7 ms 348 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 8 ms 456 KB Output is correct
8 Correct 4 ms 348 KB Output is correct
9 Correct 12 ms 348 KB Output is correct
10 Correct 12 ms 348 KB Output is correct
11 Correct 13 ms 520 KB Output is correct
12 Correct 30 ms 348 KB Output is correct
13 Correct 30 ms 344 KB Output is correct
14 Correct 31 ms 348 KB Output is correct
15 Correct 14 ms 604 KB Output is correct
16 Correct 11 ms 536 KB Output is correct
17 Correct 15 ms 532 KB Output is correct
18 Correct 15 ms 348 KB Output is correct
19 Correct 14 ms 532 KB Output is correct
20 Correct 15 ms 352 KB Output is correct
21 Correct 16 ms 352 KB Output is correct
22 Correct 15 ms 532 KB Output is correct
23 Correct 11 ms 464 KB Output is correct
24 Correct 14 ms 604 KB Output is correct
25 Correct 12 ms 540 KB Output is correct
26 Correct 13 ms 348 KB Output is correct
27 Correct 9 ms 484 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 348 KB Output is correct

Subtask #2
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 452 KB Output is correct
4 Correct 9 ms 348 KB Output is correct
5 Correct 7 ms 348 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 8 ms 456 KB Output is correct
8 Correct 4 ms 348 KB Output is correct
9 Correct 12 ms 348 KB Output is correct
10 Correct 12 ms 348 KB Output is correct
11 Correct 13 ms 520 KB Output is correct
12 Correct 30 ms 348 KB Output is correct
13 Correct 30 ms 344 KB Output is correct
14 Correct 31 ms 348 KB Output is correct
15 Correct 14 ms 604 KB Output is correct
16 Correct 11 ms 536 KB Output is correct
17 Correct 15 ms 532 KB Output is correct
18 Correct 15 ms 348 KB Output is correct
19 Correct 14 ms 532 KB Output is correct
20 Correct 15 ms 352 KB Output is correct
21 Correct 16 ms 352 KB Output is correct
22 Correct 15 ms 532 KB Output is correct
23 Correct 11 ms 464 KB Output is correct
24 Correct 14 ms 604 KB Output is correct
25 Correct 12 ms 540 KB Output is correct
26 Correct 13 ms 348 KB Output is correct
27 Correct 9 ms 484 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Incorrect 73 ms 604 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 352 KB Output is correct
2 Correct 9 ms 348 KB Output is correct
3 Correct 99 ms 604 KB Output is correct
4 Runtime error 1 ms 604 KB Execution killed with signal 6
5 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Runtime error 1 ms 604 KB Execution killed with signal 6
3 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 14 ms 476 KB Output is correct
3 Correct 106 ms 604 KB Output is correct
4 Runtime error 1 ms 604 KB Execution killed with signal 6
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 452 KB Output is correct
4 Correct 9 ms 348 KB Output is correct
5 Correct 7 ms 348 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 8 ms 456 KB Output is correct
8 Correct 4 ms 348 KB Output is correct
9 Correct 12 ms 348 KB Output is correct
10 Correct 12 ms 348 KB Output is correct
11 Correct 13 ms 520 KB Output is correct
12 Correct 30 ms 348 KB Output is correct
13 Correct 30 ms 344 KB Output is correct
14 Correct 31 ms 348 KB Output is correct
15 Correct 14 ms 604 KB Output is correct
16 Correct 11 ms 536 KB Output is correct
17 Correct 15 ms 532 KB Output is correct
18 Correct 15 ms 348 KB Output is correct
19 Correct 14 ms 532 KB Output is correct
20 Correct 15 ms 352 KB Output is correct
21 Correct 16 ms 352 KB Output is correct
22 Correct 15 ms 532 KB Output is correct
23 Correct 11 ms 464 KB Output is correct
24 Correct 14 ms 604 KB Output is correct
25 Correct 12 ms 540 KB Output is correct
26 Correct 13 ms 348 KB Output is correct
27 Correct 9 ms 484 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Incorrect 73 ms 604 KB Output isn't correct
31 Halted 0 ms 0 KB -