oj.uz

답안 #1019760

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1019760 2024-07-11T08:38:46 Z Pacybwoah Tourism (JOI23_tourism) C++17
5 / 100
 116 ms 14660 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++;
                if(n <= 2000) add(vec[rb]);
            }
            last_cnt = cnt;
            for(int i = a; i <= min(b, lb); i++){
                //cnt = cnt * cnt % n;
                if(n <= 2000) add(vec[i]);
            }
            ans[y.second] = cnt;
            cnt = last_cnt;
            for(int i = a; i <= min(b, lb); i++){
                if(n <= 2000) s.erase(s.find(vec[i]));
                else cnt = cnt * cnt % n;
            }
            //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

# 결과 실행 시간 메모리 Grader output
1 Correct 0 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 504 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 348 KB Output is correct
9 Correct 11 ms 348 KB Output is correct
10 Correct 11 ms 512 KB Output is correct
11 Correct 11 ms 348 KB Output is correct
12 Correct 30 ms 524 KB Output is correct
13 Correct 30 ms 348 KB Output is correct
14 Correct 30 ms 520 KB Output is correct
15 Correct 12 ms 348 KB Output is correct
16 Correct 10 ms 348 KB Output is correct
17 Correct 12 ms 344 KB Output is correct
18 Correct 12 ms 348 KB Output is correct
19 Correct 11 ms 348 KB Output is correct
20 Correct 12 ms 348 KB Output is correct
21 Correct 11 ms 528 KB Output is correct
22 Correct 11 ms 348 KB Output is correct
23 Correct 11 ms 348 KB Output is correct
24 Correct 11 ms 520 KB Output is correct
25 Correct 11 ms 348 KB Output is correct
26 Correct 11 ms 348 KB Output is correct
27 Correct 9 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 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 504 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 348 KB Output is correct
9 Correct 11 ms 348 KB Output is correct
10 Correct 11 ms 512 KB Output is correct
11 Correct 11 ms 348 KB Output is correct
12 Correct 30 ms 524 KB Output is correct
13 Correct 30 ms 348 KB Output is correct
14 Correct 30 ms 520 KB Output is correct
15 Correct 12 ms 348 KB Output is correct
16 Correct 10 ms 348 KB Output is correct
17 Correct 12 ms 344 KB Output is correct
18 Correct 12 ms 348 KB Output is correct
19 Correct 11 ms 348 KB Output is correct
20 Correct 12 ms 348 KB Output is correct
21 Correct 11 ms 528 KB Output is correct
22 Correct 11 ms 348 KB Output is correct
23 Correct 11 ms 348 KB Output is correct
24 Correct 11 ms 520 KB Output is correct
25 Correct 11 ms 348 KB Output is correct
26 Correct 11 ms 348 KB Output is correct
27 Correct 9 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Incorrect 82 ms 600 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 11 ms 472 KB Output is correct
3 Correct 95 ms 348 KB Output is correct
4 Incorrect 98 ms 14660 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 20 ms 9092 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 9 ms 484 KB Output is correct
3 Correct 95 ms 552 KB Output is correct
4 Incorrect 116 ms 12920 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 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 504 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 348 KB Output is correct
9 Correct 11 ms 348 KB Output is correct
10 Correct 11 ms 512 KB Output is correct
11 Correct 11 ms 348 KB Output is correct
12 Correct 30 ms 524 KB Output is correct
13 Correct 30 ms 348 KB Output is correct
14 Correct 30 ms 520 KB Output is correct
15 Correct 12 ms 348 KB Output is correct
16 Correct 10 ms 348 KB Output is correct
17 Correct 12 ms 344 KB Output is correct
18 Correct 12 ms 348 KB Output is correct
19 Correct 11 ms 348 KB Output is correct
20 Correct 12 ms 348 KB Output is correct
21 Correct 11 ms 528 KB Output is correct
22 Correct 11 ms 348 KB Output is correct
23 Correct 11 ms 348 KB Output is correct
24 Correct 11 ms 520 KB Output is correct
25 Correct 11 ms 348 KB Output is correct
26 Correct 11 ms 348 KB Output is correct
27 Correct 9 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Incorrect 82 ms 600 KB Output isn't correct
31 Halted 0 ms 0 KB -