oj.uz

Submission #1019718

# Submission time Handle Problem Language Result Execution time Memory
1019718 2024-07-11T08:14:50 Z Pacybwoah Tourism (JOI23_tourism) C++17
23 / 100
 5000 ms 21020 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;
    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 a, int b, int c){
        return (dist(a, b) + dist(a, c) - dist(b, c)) / 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 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 12 ms 504 KB Output is correct
5 Correct 6 ms 512 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 6 ms 504 KB Output is correct
8 Correct 6 ms 604 KB Output is correct
9 Correct 12 ms 528 KB Output is correct
10 Correct 12 ms 348 KB Output is correct
11 Correct 14 ms 516 KB Output is correct
12 Correct 32 ms 348 KB Output is correct
13 Correct 32 ms 524 KB Output is correct
14 Correct 30 ms 348 KB Output is correct
15 Correct 12 ms 348 KB Output is correct
16 Correct 11 ms 520 KB Output is correct
17 Correct 12 ms 536 KB Output is correct
18 Correct 12 ms 528 KB Output is correct
19 Correct 11 ms 536 KB Output is correct
20 Correct 12 ms 528 KB Output is correct
21 Correct 11 ms 528 KB Output is correct
22 Correct 11 ms 528 KB Output is correct
23 Correct 11 ms 344 KB Output is correct
24 Correct 12 ms 348 KB Output is correct
25 Correct 12 ms 532 KB Output is correct
26 Correct 11 ms 344 KB Output is correct
27 Correct 10 ms 348 KB Output is correct
28 Correct 1 ms 348 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 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 12 ms 504 KB Output is correct
5 Correct 6 ms 512 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 6 ms 504 KB Output is correct
8 Correct 6 ms 604 KB Output is correct
9 Correct 12 ms 528 KB Output is correct
10 Correct 12 ms 348 KB Output is correct
11 Correct 14 ms 516 KB Output is correct
12 Correct 32 ms 348 KB Output is correct
13 Correct 32 ms 524 KB Output is correct
14 Correct 30 ms 348 KB Output is correct
15 Correct 12 ms 348 KB Output is correct
16 Correct 11 ms 520 KB Output is correct
17 Correct 12 ms 536 KB Output is correct
18 Correct 12 ms 528 KB Output is correct
19 Correct 11 ms 536 KB Output is correct
20 Correct 12 ms 528 KB Output is correct
21 Correct 11 ms 528 KB Output is correct
22 Correct 11 ms 528 KB Output is correct
23 Correct 11 ms 344 KB Output is correct
24 Correct 12 ms 348 KB Output is correct
25 Correct 12 ms 532 KB Output is correct
26 Correct 11 ms 344 KB Output is correct
27 Correct 10 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Incorrect 70 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 1 ms 344 KB Output is correct
2 Correct 11 ms 484 KB Output is correct
3 Correct 96 ms 564 KB Output is correct
4 Execution timed out 5046 ms 18552 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 452 KB Output is correct
2 Correct 59 ms 9080 KB Output is correct
3 Correct 83 ms 10252 KB Output is correct
4 Correct 70 ms 11332 KB Output is correct
5 Correct 145 ms 20936 KB Output is correct
6 Correct 137 ms 17884 KB Output is correct
7 Correct 146 ms 16844 KB Output is correct
8 Correct 158 ms 16332 KB Output is correct
9 Correct 130 ms 16436 KB Output is correct
10 Correct 119 ms 16348 KB Output is correct
11 Correct 135 ms 16588 KB Output is correct
12 Correct 126 ms 16540 KB Output is correct
13 Correct 104 ms 16584 KB Output is correct
14 Correct 91 ms 17356 KB Output is correct
15 Correct 54 ms 19944 KB Output is correct
16 Correct 119 ms 18828 KB Output is correct
17 Correct 122 ms 18632 KB Output is correct
18 Correct 116 ms 18632 KB Output is correct
19 Correct 146 ms 21020 KB Output is correct
20 Correct 143 ms 18600 KB Output is correct
21 Correct 145 ms 17092 KB Output is correct
22 Correct 152 ms 16844 KB Output is correct
23 Correct 145 ms 16584 KB Output is correct
24 Correct 160 ms 16488 KB Output is correct
25 Correct 154 ms 16332 KB Output is correct
26 Correct 164 ms 16332 KB Output is correct
27 Correct 160 ms 16680 KB Output is correct
28 Correct 149 ms 16340 KB Output is correct
29 Correct 143 ms 16332 KB Output is correct
30 Correct 139 ms 16460 KB Output is correct
31 Correct 143 ms 16672 KB Output is correct
32 Correct 122 ms 16840 KB Output is correct
33 Correct 98 ms 18096 KB Output is correct
34 Correct 53 ms 20168 KB Output is correct

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 10 ms 348 KB Output is correct
3 Correct 97 ms 548 KB Output is correct
4 Execution timed out 5052 ms 16760 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 12 ms 504 KB Output is correct
5 Correct 6 ms 512 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 6 ms 504 KB Output is correct
8 Correct 6 ms 604 KB Output is correct
9 Correct 12 ms 528 KB Output is correct
10 Correct 12 ms 348 KB Output is correct
11 Correct 14 ms 516 KB Output is correct
12 Correct 32 ms 348 KB Output is correct
13 Correct 32 ms 524 KB Output is correct
14 Correct 30 ms 348 KB Output is correct
15 Correct 12 ms 348 KB Output is correct
16 Correct 11 ms 520 KB Output is correct
17 Correct 12 ms 536 KB Output is correct
18 Correct 12 ms 528 KB Output is correct
19 Correct 11 ms 536 KB Output is correct
20 Correct 12 ms 528 KB Output is correct
21 Correct 11 ms 528 KB Output is correct
22 Correct 11 ms 528 KB Output is correct
23 Correct 11 ms 344 KB Output is correct
24 Correct 12 ms 348 KB Output is correct
25 Correct 12 ms 532 KB Output is correct
26 Correct 11 ms 344 KB Output is correct
27 Correct 10 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Incorrect 70 ms 604 KB Output isn't correct
31 Halted 0 ms 0 KB -