oj.uz

Submission #1019798

# Submission time Handle Problem Language Result Execution time Memory
1019798 2024-07-11T08:57:25 Z Pacybwoah Tourism (JOI23_tourism) C++17
10 / 100
 213 ms 14748 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, last_lca;
        auto add = [&](int node){
            if(s.empty()){
                now_lca = node;
                s.insert(node);
                cnt = 1;
                return;
            }
            auto iter = s.upper_bound(node);
            if(n > 2000) return;
            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);
                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;
            last_lca = now_lca;
            for(int i = a; i <= min(b, lb); i++){
                add(vec[i]);
            }
            ans[y.second] = cnt;
            cnt = last_cnt;
            now_lca = last_lca;
            for(int i = a; i <= min(b, lb); i++){
                if(n <= 2000) s.erase(s.find(vec[i]));
            }
        }
    }
    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 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 7 ms 496 KB Output is correct
5 Correct 5 ms 348 KB Output is correct
6 Correct 5 ms 492 KB Output is correct
7 Correct 6 ms 348 KB Output is correct
8 Correct 4 ms 348 KB Output is correct
9 Correct 12 ms 456 KB Output is correct
10 Correct 11 ms 348 KB Output is correct
11 Correct 13 ms 348 KB Output is correct
12 Correct 30 ms 348 KB Output is correct
13 Correct 30 ms 348 KB Output is correct
14 Correct 30 ms 344 KB Output is correct
15 Correct 12 ms 348 KB Output is correct
16 Correct 11 ms 536 KB Output is correct
17 Correct 12 ms 344 KB Output is correct
18 Correct 14 ms 344 KB Output is correct
19 Correct 11 ms 348 KB Output is correct
20 Correct 12 ms 348 KB Output is correct
21 Correct 13 ms 520 KB Output is correct
22 Correct 14 ms 600 KB Output is correct
23 Correct 14 ms 532 KB Output is correct
24 Correct 11 ms 348 KB Output is correct
25 Correct 12 ms 348 KB Output is correct
26 Correct 11 ms 528 KB Output is correct
27 Correct 10 ms 488 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct

Subtask #2
5.0 / 5.0

# 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 Correct 7 ms 496 KB Output is correct
5 Correct 5 ms 348 KB Output is correct
6 Correct 5 ms 492 KB Output is correct
7 Correct 6 ms 348 KB Output is correct
8 Correct 4 ms 348 KB Output is correct
9 Correct 12 ms 456 KB Output is correct
10 Correct 11 ms 348 KB Output is correct
11 Correct 13 ms 348 KB Output is correct
12 Correct 30 ms 348 KB Output is correct
13 Correct 30 ms 348 KB Output is correct
14 Correct 30 ms 344 KB Output is correct
15 Correct 12 ms 348 KB Output is correct
16 Correct 11 ms 536 KB Output is correct
17 Correct 12 ms 344 KB Output is correct
18 Correct 14 ms 344 KB Output is correct
19 Correct 11 ms 348 KB Output is correct
20 Correct 12 ms 348 KB Output is correct
21 Correct 13 ms 520 KB Output is correct
22 Correct 14 ms 600 KB Output is correct
23 Correct 14 ms 532 KB Output is correct
24 Correct 11 ms 348 KB Output is correct
25 Correct 12 ms 348 KB Output is correct
26 Correct 11 ms 528 KB Output is correct
27 Correct 10 ms 488 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 82 ms 752 KB Output is correct
31 Correct 95 ms 752 KB Output is correct
32 Correct 150 ms 1112 KB Output is correct
33 Correct 145 ms 892 KB Output is correct
34 Correct 112 ms 860 KB Output is correct
35 Correct 207 ms 1104 KB Output is correct
36 Correct 196 ms 856 KB Output is correct
37 Correct 213 ms 884 KB Output is correct
38 Correct 119 ms 856 KB Output is correct
39 Correct 118 ms 940 KB Output is correct
40 Correct 122 ms 972 KB Output is correct
41 Correct 201 ms 960 KB Output is correct
42 Correct 202 ms 980 KB Output is correct
43 Correct 201 ms 936 KB Output is correct
44 Correct 115 ms 932 KB Output is correct
45 Correct 172 ms 856 KB Output is correct
46 Correct 115 ms 904 KB Output is correct
47 Correct 184 ms 856 KB Output is correct
48 Correct 181 ms 860 KB Output is correct
49 Correct 194 ms 916 KB Output is correct
50 Correct 113 ms 860 KB Output is correct
51 Correct 137 ms 908 KB Output is correct
52 Correct 113 ms 884 KB Output is correct
53 Correct 103 ms 856 KB Output is correct
54 Correct 105 ms 856 KB Output is correct
55 Correct 101 ms 908 KB Output is correct
56 Correct 101 ms 592 KB Output is correct
57 Correct 1 ms 600 KB Output is correct
58 Correct 2 ms 604 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 9 ms 480 KB Output is correct
3 Correct 95 ms 564 KB Output is correct
4 Incorrect 179 ms 14748 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 21 ms 9264 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 9 ms 348 KB Output is correct
3 Correct 95 ms 600 KB Output is correct
4 Incorrect 196 ms 12916 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# 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 Correct 7 ms 496 KB Output is correct
5 Correct 5 ms 348 KB Output is correct
6 Correct 5 ms 492 KB Output is correct
7 Correct 6 ms 348 KB Output is correct
8 Correct 4 ms 348 KB Output is correct
9 Correct 12 ms 456 KB Output is correct
10 Correct 11 ms 348 KB Output is correct
11 Correct 13 ms 348 KB Output is correct
12 Correct 30 ms 348 KB Output is correct
13 Correct 30 ms 348 KB Output is correct
14 Correct 30 ms 344 KB Output is correct
15 Correct 12 ms 348 KB Output is correct
16 Correct 11 ms 536 KB Output is correct
17 Correct 12 ms 344 KB Output is correct
18 Correct 14 ms 344 KB Output is correct
19 Correct 11 ms 348 KB Output is correct
20 Correct 12 ms 348 KB Output is correct
21 Correct 13 ms 520 KB Output is correct
22 Correct 14 ms 600 KB Output is correct
23 Correct 14 ms 532 KB Output is correct
24 Correct 11 ms 348 KB Output is correct
25 Correct 12 ms 348 KB Output is correct
26 Correct 11 ms 528 KB Output is correct
27 Correct 10 ms 488 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 344 KB Output is correct
30 Correct 82 ms 752 KB Output is correct
31 Correct 95 ms 752 KB Output is correct
32 Correct 150 ms 1112 KB Output is correct
33 Correct 145 ms 892 KB Output is correct
34 Correct 112 ms 860 KB Output is correct
35 Correct 207 ms 1104 KB Output is correct
36 Correct 196 ms 856 KB Output is correct
37 Correct 213 ms 884 KB Output is correct
38 Correct 119 ms 856 KB Output is correct
39 Correct 118 ms 940 KB Output is correct
40 Correct 122 ms 972 KB Output is correct
41 Correct 201 ms 960 KB Output is correct
42 Correct 202 ms 980 KB Output is correct
43 Correct 201 ms 936 KB Output is correct
44 Correct 115 ms 932 KB Output is correct
45 Correct 172 ms 856 KB Output is correct
46 Correct 115 ms 904 KB Output is correct
47 Correct 184 ms 856 KB Output is correct
48 Correct 181 ms 860 KB Output is correct
49 Correct 194 ms 916 KB Output is correct
50 Correct 113 ms 860 KB Output is correct
51 Correct 137 ms 908 KB Output is correct
52 Correct 113 ms 884 KB Output is correct
53 Correct 103 ms 856 KB Output is correct
54 Correct 105 ms 856 KB Output is correct
55 Correct 101 ms 908 KB Output is correct
56 Correct 101 ms 592 KB Output is correct
57 Correct 1 ms 600 KB Output is correct
58 Correct 2 ms 604 KB Output is correct
59 Correct 0 ms 344 KB Output is correct
60 Correct 9 ms 480 KB Output is correct
61 Correct 95 ms 564 KB Output is correct
62 Incorrect 179 ms 14748 KB Output isn't correct
63 Halted 0 ms 0 KB -