oj.uz

Submission #1019765

# Submission time Handle Problem Language Result Execution time Memory
1019765 2024-07-11T08:40:24 Z Pacybwoah Tourism (JOI23_tourism) C++17
23 / 100
 5000 ms 21196 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 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 348 KB Output is correct
5 Correct 5 ms 496 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 6 ms 348 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 12 ms 516 KB Output is correct
10 Correct 12 ms 348 KB Output is correct
11 Correct 16 ms 524 KB Output is correct
12 Correct 31 ms 348 KB Output is correct
13 Correct 30 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 348 KB Output is correct
17 Correct 12 ms 348 KB Output is correct
18 Correct 11 ms 528 KB Output is correct
19 Correct 11 ms 520 KB Output is correct
20 Correct 12 ms 348 KB Output is correct
21 Correct 11 ms 348 KB Output is correct
22 Correct 10 ms 520 KB Output is correct
23 Correct 11 ms 344 KB Output is correct
24 Correct 10 ms 520 KB Output is correct
25 Correct 13 ms 424 KB Output is correct
26 Correct 11 ms 348 KB Output is correct
27 Correct 13 ms 348 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 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 348 KB Output is correct
5 Correct 5 ms 496 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 6 ms 348 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 12 ms 516 KB Output is correct
10 Correct 12 ms 348 KB Output is correct
11 Correct 16 ms 524 KB Output is correct
12 Correct 31 ms 348 KB Output is correct
13 Correct 30 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 348 KB Output is correct
17 Correct 12 ms 348 KB Output is correct
18 Correct 11 ms 528 KB Output is correct
19 Correct 11 ms 520 KB Output is correct
20 Correct 12 ms 348 KB Output is correct
21 Correct 11 ms 348 KB Output is correct
22 Correct 10 ms 520 KB Output is correct
23 Correct 11 ms 344 KB Output is correct
24 Correct 10 ms 520 KB Output is correct
25 Correct 13 ms 424 KB Output is correct
26 Correct 11 ms 348 KB Output is correct
27 Correct 13 ms 348 KB Output is correct
28 Correct 1 ms 344 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 0 ms 348 KB Output is correct
2 Correct 9 ms 472 KB Output is correct
3 Correct 95 ms 576 KB Output is correct
4 Execution timed out 5053 ms 16572 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 600 KB Output is correct
2 Correct 54 ms 8320 KB Output is correct
3 Correct 89 ms 10096 KB Output is correct
4 Correct 69 ms 11332 KB Output is correct
5 Correct 152 ms 21196 KB Output is correct
6 Correct 148 ms 17868 KB Output is correct
7 Correct 152 ms 16840 KB Output is correct
8 Correct 137 ms 16332 KB Output is correct
9 Correct 121 ms 16332 KB Output is correct
10 Correct 121 ms 16204 KB Output is correct
11 Correct 109 ms 16332 KB Output is correct
12 Correct 104 ms 16328 KB Output is correct
13 Correct 96 ms 16724 KB Output is correct
14 Correct 90 ms 17228 KB Output is correct
15 Correct 61 ms 19912 KB Output is correct
16 Correct 117 ms 18632 KB Output is correct
17 Correct 130 ms 18636 KB Output is correct
18 Correct 127 ms 18636 KB Output is correct
19 Correct 136 ms 20936 KB Output is correct
20 Correct 139 ms 18712 KB Output is correct
21 Correct 149 ms 17352 KB Output is correct
22 Correct 145 ms 16636 KB Output is correct
23 Correct 156 ms 16620 KB Output is correct
24 Correct 174 ms 16336 KB Output is correct
25 Correct 153 ms 16332 KB Output is correct
26 Correct 159 ms 16440 KB Output is correct
27 Correct 144 ms 16332 KB Output is correct
28 Correct 151 ms 16880 KB Output is correct
29 Correct 137 ms 16448 KB Output is correct
30 Correct 138 ms 16588 KB Output is correct
31 Correct 141 ms 16584 KB Output is correct
32 Correct 122 ms 16956 KB Output is correct
33 Correct 94 ms 18260 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 1 ms 348 KB Output is correct
2 Correct 9 ms 480 KB Output is correct
3 Correct 95 ms 348 KB Output is correct
4 Execution timed out 5051 ms 14456 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 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 348 KB Output is correct
5 Correct 5 ms 496 KB Output is correct
6 Correct 5 ms 348 KB Output is correct
7 Correct 6 ms 348 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 12 ms 516 KB Output is correct
10 Correct 12 ms 348 KB Output is correct
11 Correct 16 ms 524 KB Output is correct
12 Correct 31 ms 348 KB Output is correct
13 Correct 30 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 348 KB Output is correct
17 Correct 12 ms 348 KB Output is correct
18 Correct 11 ms 528 KB Output is correct
19 Correct 11 ms 520 KB Output is correct
20 Correct 12 ms 348 KB Output is correct
21 Correct 11 ms 348 KB Output is correct
22 Correct 10 ms 520 KB Output is correct
23 Correct 11 ms 344 KB Output is correct
24 Correct 10 ms 520 KB Output is correct
25 Correct 13 ms 424 KB Output is correct
26 Correct 11 ms 348 KB Output is correct
27 Correct 13 ms 348 KB Output is correct
28 Correct 1 ms 344 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 -