oj.uz

답안 #1053601

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1053601 2024-08-11T14:11:03 Z j_vdd16 Jail (JOI22_jail) C++17
0 / 100
 5000 ms 27648 KB 
#include <algorithm>
#include <bitset>
#include <cstdint>
#include <cstring>
#include <iostream>
#include <limits.h>
#include <math.h>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

#define loop(X, N) for(int X = 0; X < (N); X++)
#define all(V) V.begin(), V.end()
#define rall(V) V.rbegin(), V.rend()

using namespace std;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
typedef vector<vector<ii>> vvii;
typedef vector<bool> vb;
typedef vector<vector<bool>> vvb;


int n, m;
vvi adj;
vi depth;
vi parent;

vii inOut;
int counter;
void dfs(int node, int p, int d) {
    depth[node] = d;

    inOut[node].first = counter++;

    for (int child : adj[node]) {
        if (child == p) continue;

        parent[child] = node;
        dfs(child, node, d + 1);
    }

    inOut[node].second = counter++;
}

constexpr int POW = 20;
vi lift[POW];

bool isAncestor(int a, int b) {
    return inOut[a].first <= inOut[b].first && inOut[b].first <= inOut[a].second;
}
bool isBetween(int node, int a, int b) {
    return isAncestor(a, node) && isAncestor(node, b);
}
int getLCA(int a, int b) {
    if (depth[a] < depth[b]) swap(a, b);

    int todo = depth[a] - depth[b];
    loop(pow, POW) {
        if (todo & (1 << pow)) {
            a = lift[pow][a];
        }
    }

    if (a == b) return a;

    for (int pow = POW - 1; pow >= 0; pow--) {
        if (lift[pow][a] == lift[pow][a]) continue;

        a = lift[pow][a];
        b = lift[pow][b];
    }

    return lift[0][a];
}
bool isOnSimplePath(int node, int a, int b) {
    int lca = getLCA(a, b);

    bool result = isBetween(node, lca, a) || isBetween(node, lca, b);
    return result;
}

signed main()
{
	ios::sync_with_stdio(0);
	cin.tie(0);

    /*
1
7
1 2
2 3
3 4
4 5
5 6
6 7
3

    */

/*
1
8
1 2
2 3
3 4
4 5
5 6
6 7
7 8
2
1 5
5 3
*/

    int q;
    cin >> q;

    while (q--) {
        cin >> n;

        counter = 0;
        adj = vvi(n);
        depth = vi(n);
        parent = vi(n);
        inOut = vii(n);
        loop(i, n - 1) {
            int a, b;
            cin >> a >> b;
            a--; b--;

            adj[a].push_back(b);
            adj[b].push_back(a);
        }
        dfs(0, -1, 0);

        loop(i, POW) {
            lift[i] = vi(n);
        }

        loop(i, n) lift[0][i] = parent[i];
        lift[0][0] = 0;

        for (int pow = 1; pow < POW; pow++) {
            loop(j, n) {
                int next = lift[pow - 1][j];
                lift[pow][j] = lift[pow - 1][next];
            }
        }

        vii routes;
        cin >> m;
        loop(i, m) {
            int s, t;
            cin >> s >> t;
            s--; t--;

            routes.push_back({s, t});
        }
        sort(all(routes));

        bool containSuccess = true;
        vi inDegree(m);
        vvi out(m);
        loop(i, m) {
            auto [s1, t1] = routes[i];

            loop(j, m) {
                auto [s2, t2] = routes[j];
                if (i == j) continue;
                
                if (s1 < s2 && t1 > t2) containSuccess = false;
                if (min(s1, t1) <= min(s2, t2) && max(s2, t2) <= max(s1, t1)) containSuccess = false;
                if (min(s1, t1) <= t2 && t2 <= max(s1, t1) && min(s2, t2) <= t1 && t1 <= max(s2, t2)) containSuccess = false;

                // if (isOnSimplePath(t2, s1, t1)) {
                //     out[j].push_back(i);
                //     inDegree[i]++;

                //     if (isOnSimplePath(s2, s1, t1)) containSuccess = false;
                // }
                // if (isOnSimplePath(t1, s2, t2)) {
                //     out[i].push_back(j);
                //     inDegree[j]++;

                //     if (isOnSimplePath(s1, s2, t2)) containSuccess = false;
                // }
            }

        }

        stack<int> startingPoints;
        loop(i, m) {
            if (inDegree[i] == 0) startingPoints.push(i);
        }

        int count = 0;
        while (startingPoints.size()) {
            int node = startingPoints.top();
            startingPoints.pop();

            count++;
            for (int child : out[node]) {
                inDegree[child]--;
                if (inDegree[child] == 0) startingPoints.push(child);
            }
        }


        bool testSuccess = true;
        int prev = 0;
        for (auto [s, t] : routes) {
            if (t < prev) {
                testSuccess = false;
            }
            
            prev = t;
        }

        if (testSuccess) {
            cerr << "Yes (first subtask only)" << endl;
        }
        else {
            cerr << "No (first subtask only)" << endl;
        }
        if (!containSuccess || count != m) {
            cout << "No" << endl;
        }
        else {
            cout << "Yes" << endl;
        }
    }

	return 0;
}

Subtask #1
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 11 ms 348 KB Output is correct
5 Correct 17 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 28 ms 2040 KB Output is correct
10 Correct 25 ms 25680 KB Output is correct
11 Correct 6 ms 348 KB Output is correct
12 Correct 27 ms 348 KB Output is correct
13 Correct 4215 ms 27648 KB Output is correct
14 Correct 4162 ms 27644 KB Output is correct
15 Execution timed out 5057 ms 27596 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #2
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Incorrect 1 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Incorrect 1 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Incorrect 1 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Incorrect 1 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 13 ms 472 KB Output is correct
6 Incorrect 1 ms 348 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 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 11 ms 348 KB Output is correct
5 Correct 17 ms 344 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 2 ms 344 KB Output is correct
9 Correct 28 ms 2040 KB Output is correct
10 Correct 25 ms 25680 KB Output is correct
11 Correct 6 ms 348 KB Output is correct
12 Correct 27 ms 348 KB Output is correct
13 Correct 4215 ms 27648 KB Output is correct
14 Correct 4162 ms 27644 KB Output is correct
15 Execution timed out 5057 ms 27596 KB Time limit exceeded
16 Halted 0 ms 0 KB -