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답안 #994209

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
994209 2024-06-07T08:57:11 Z vjudge1 Jail (JOI22_jail) C++17
61 / 100
 5000 ms 1048576 KB 
#include <bits/stdc++.h>

using namespace std;
using ll = long long;

const int MAXN = 120'001;
const int K = 20;

vector<int> g[MAXN], g2[MAXN];
int tin[MAXN], tout[MAXN], s[MAXN], e[MAXN], col[MAXN], hv[MAXN], up[MAXN][K], timer;
bool ok;

void dfs(int u, int p = -1) {
    tin[u] = timer++;
    up[u][0] = p == -1 ? 0 : p;
    for (int v : g[u]) {
        if (v != p) dfs(v, u);
    }
    tout[u] = timer++;
}

void dfs2(int u, stack<int> &top) {
    col[u] = 1;
    for (int v : g2[u]) {
        if (col[v] == 0) dfs2(v, top);
        else if (col[v] == 1) ok = false;
    }
    col[u] = 2;
    top.push(u);
}

bool is_ancestor(int u, int v) {
    return tin[u] <= tin[v] && tout[v] <= tout[u];
}

int get_next(int u, int v) {
    for (int i = K-1; i >= 0; i--) {
        if (up[v][i] && !is_ancestor(up[v][i], u) && up[v][i] != u) v = up[v][i]; 
    }
    return v;
}

void solve() {
    int n; cin >> n;
    ok = true;
    fill(s, s+n+1, 0);
    fill(e, e+n+1, 0);
    fill(col, col+n+1, 0);
    fill(hv, hv+n+1, 0);
    timer = 1;
    for (int i = 1; i <= n; i++) {
        g[i].clear();
        g2[i].clear();
    }
    for (int i = 0; i < n-1; i++) {
        int u, v; cin >> u >> v;
        g[u].emplace_back(v);
        g[v].emplace_back(u);
    }
    dfs(1);

    for (int u = 1; u <= n; u++) {
        for (int i = 1; i < K; i++) {
            up[u][i] = up[up[u][i-1]][i-1];
        }
    }

    int m; cin >> m;
    vector<pair<int, int>> edges(m+1);
    for (int i = 1; i <= m; i++) {
        cin >> edges[i].first >> edges[i].second;
        auto [u, v] = edges[i];
        s[u] = e[v] = i;
        hv[edges[i].first] = i;
    }

    auto nxt = [&](int u, int v) {
        if (u == v) return -1;
        if (is_ancestor(u, v)) {
            for (int i : g[u]) {
                if (up[u][0] != i && is_ancestor(i, v)) {
                    return i;
                }
            }
            return get_next(u, v);
        } else {
            return up[u][0];
        }
    };

    for (int i = 1; i <= m; i++) {
        auto [u, v] = edges[i];
        while (u != -1) {
            if (e[u] && e[u] != i) {
                g2[i].emplace_back(e[u]);
            }
            if (s[u] && s[u] != i) {
                g2[s[u]].emplace_back(i);
            }
            u = nxt(u, v);
        }
    }

    function<void(int,int)> mv = [&](int idx, int p) {
        if (!ok) return;
        int v = nxt(edges[idx].first, edges[idx].second);
        if (v == -1 || v == p) {
            ok = false;
            return;
        }
        if (hv[v]) {
            mv(hv[v], edges[idx].first);
        }
        hv[edges[idx].first] = 0;
        hv[v] = idx;
        edges[idx].first = v;
    };

    stack<int> top;
    for (int i = 1; i <= m; i++) {
        if (col[i] == 0) dfs2(i, top);
    }
    while (!top.empty() && ok) {
        int i = top.top(); top.pop();
        while (edges[i].first != edges[i].second && ok) {
            mv(i, -1);
        }
    }
    cout << (ok?"Yes\n":"No\n");
}

int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int t; cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9816 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 11 ms 9936 KB Output is correct
5 Correct 22 ms 9944 KB Output is correct
6 Correct 3 ms 9816 KB Output is correct
7 Correct 3 ms 9820 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 113 ms 14552 KB Output is correct
10 Correct 745 ms 29012 KB Output is correct
11 Correct 6 ms 9820 KB Output is correct
12 Correct 35 ms 10040 KB Output is correct
13 Correct 163 ms 57940 KB Output is correct
14 Correct 116 ms 71760 KB Output is correct
15 Runtime error 4219 ms 1048576 KB Execution killed with signal 9
16 Halted 0 ms 0 KB -

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9816 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 3 ms 9884 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 2 ms 9880 KB Output is correct
6 Correct 3 ms 9816 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 3 ms 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 3 ms 10072 KB Output is correct
11 Correct 3 ms 9816 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9904 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9816 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 3 ms 9884 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 2 ms 9880 KB Output is correct
6 Correct 3 ms 9816 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 3 ms 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 3 ms 10072 KB Output is correct
11 Correct 3 ms 9816 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9904 KB Output is correct
14 Correct 2 ms 9820 KB Output is correct
15 Correct 2 ms 9820 KB Output is correct
16 Correct 2 ms 9820 KB Output is correct
17 Correct 3 ms 9948 KB Output is correct
18 Correct 3 ms 9816 KB Output is correct
19 Correct 2 ms 9820 KB Output is correct
20 Correct 3 ms 9820 KB Output is correct
21 Correct 3 ms 9820 KB Output is correct
22 Correct 3 ms 9820 KB Output is correct
23 Correct 2 ms 9820 KB Output is correct
24 Correct 2 ms 9816 KB Output is correct
25 Correct 3 ms 9948 KB Output is correct
26 Correct 2 ms 9820 KB Output is correct
27 Correct 3 ms 9820 KB Output is correct
28 Correct 2 ms 9820 KB Output is correct

Subtask #4
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9816 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 3 ms 9884 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 2 ms 9880 KB Output is correct
6 Correct 3 ms 9816 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 3 ms 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 3 ms 10072 KB Output is correct
11 Correct 3 ms 9816 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9904 KB Output is correct
14 Correct 2 ms 9820 KB Output is correct
15 Correct 2 ms 9820 KB Output is correct
16 Correct 2 ms 9820 KB Output is correct
17 Correct 3 ms 9948 KB Output is correct
18 Correct 3 ms 9816 KB Output is correct
19 Correct 2 ms 9820 KB Output is correct
20 Correct 3 ms 9820 KB Output is correct
21 Correct 3 ms 9820 KB Output is correct
22 Correct 3 ms 9820 KB Output is correct
23 Correct 2 ms 9820 KB Output is correct
24 Correct 2 ms 9816 KB Output is correct
25 Correct 3 ms 9948 KB Output is correct
26 Correct 2 ms 9820 KB Output is correct
27 Correct 3 ms 9820 KB Output is correct
28 Correct 2 ms 9820 KB Output is correct
29 Correct 4 ms 9820 KB Output is correct
30 Correct 3 ms 9820 KB Output is correct
31 Correct 3 ms 9820 KB Output is correct
32 Correct 4 ms 9820 KB Output is correct
33 Correct 2 ms 9820 KB Output is correct
34 Correct 3 ms 9820 KB Output is correct
35 Correct 6 ms 9820 KB Output is correct
36 Correct 3 ms 9820 KB Output is correct
37 Correct 2 ms 9964 KB Output is correct

Subtask #5
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9816 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 3 ms 9884 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 2 ms 9880 KB Output is correct
6 Correct 3 ms 9816 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 3 ms 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 3 ms 10072 KB Output is correct
11 Correct 3 ms 9816 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9904 KB Output is correct
14 Correct 2 ms 9820 KB Output is correct
15 Correct 2 ms 9820 KB Output is correct
16 Correct 2 ms 9820 KB Output is correct
17 Correct 3 ms 9948 KB Output is correct
18 Correct 3 ms 9816 KB Output is correct
19 Correct 2 ms 9820 KB Output is correct
20 Correct 3 ms 9820 KB Output is correct
21 Correct 3 ms 9820 KB Output is correct
22 Correct 3 ms 9820 KB Output is correct
23 Correct 2 ms 9820 KB Output is correct
24 Correct 2 ms 9816 KB Output is correct
25 Correct 3 ms 9948 KB Output is correct
26 Correct 2 ms 9820 KB Output is correct
27 Correct 3 ms 9820 KB Output is correct
28 Correct 2 ms 9820 KB Output is correct
29 Correct 4 ms 9820 KB Output is correct
30 Correct 3 ms 9820 KB Output is correct
31 Correct 3 ms 9820 KB Output is correct
32 Correct 4 ms 9820 KB Output is correct
33 Correct 2 ms 9820 KB Output is correct
34 Correct 3 ms 9820 KB Output is correct
35 Correct 6 ms 9820 KB Output is correct
36 Correct 3 ms 9820 KB Output is correct
37 Correct 2 ms 9964 KB Output is correct
38 Correct 107 ms 14480 KB Output is correct
39 Correct 798 ms 29012 KB Output is correct
40 Correct 77 ms 13396 KB Output is correct
41 Correct 33 ms 12380 KB Output is correct
42 Correct 57 ms 13648 KB Output is correct
43 Correct 27 ms 12376 KB Output is correct
44 Correct 8 ms 10076 KB Output is correct
45 Correct 46 ms 22060 KB Output is correct
46 Correct 43 ms 21852 KB Output is correct
47 Correct 194 ms 24920 KB Output is correct
48 Correct 202 ms 24656 KB Output is correct
49 Correct 50 ms 22108 KB Output is correct
50 Correct 70 ms 22104 KB Output is correct
51 Correct 34 ms 22876 KB Output is correct
52 Correct 32 ms 22872 KB Output is correct
53 Correct 13 ms 12380 KB Output is correct
54 Correct 50 ms 21888 KB Output is correct

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 7 ms 9820 KB Output is correct
6 Correct 2 ms 9820 KB Output is correct
7 Correct 2 ms 9820 KB Output is correct
8 Correct 2 ms 9816 KB Output is correct
9 Correct 2 ms 9824 KB Output is correct
10 Correct 2 ms 9820 KB Output is correct
11 Correct 2 ms 9820 KB Output is correct
12 Correct 3 ms 9820 KB Output is correct
13 Correct 20 ms 9948 KB Output is correct
14 Correct 30 ms 9816 KB Output is correct
15 Correct 24 ms 9820 KB Output is correct
16 Correct 55 ms 22396 KB Output is correct
17 Correct 115 ms 29520 KB Output is correct
18 Correct 211 ms 54204 KB Output is correct
19 Correct 60 ms 22516 KB Output is correct
20 Correct 58 ms 22608 KB Output is correct
21 Correct 65 ms 22608 KB Output is correct
22 Correct 95 ms 28892 KB Output is correct
23 Correct 70 ms 28980 KB Output is correct
24 Correct 94 ms 28636 KB Output is correct
25 Correct 74 ms 28748 KB Output is correct
26 Correct 92 ms 28772 KB Output is correct
27 Execution timed out 5056 ms 25284 KB Time limit exceeded
28 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 9816 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9820 KB Output is correct
4 Correct 11 ms 9936 KB Output is correct
5 Correct 22 ms 9944 KB Output is correct
6 Correct 3 ms 9816 KB Output is correct
7 Correct 3 ms 9820 KB Output is correct
8 Correct 4 ms 9820 KB Output is correct
9 Correct 113 ms 14552 KB Output is correct
10 Correct 745 ms 29012 KB Output is correct
11 Correct 6 ms 9820 KB Output is correct
12 Correct 35 ms 10040 KB Output is correct
13 Correct 163 ms 57940 KB Output is correct
14 Correct 116 ms 71760 KB Output is correct
15 Runtime error 4219 ms 1048576 KB Execution killed with signal 9
16 Halted 0 ms 0 KB -