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Submission #1044082

# Submission time Handle Problem Language Result Execution time Memory
1044082 2024-08-05T07:11:25 Z 우민규(#11006) Parking (CEOI22_parking) C++17
20 / 100
 76 ms 16284 KB 
#include <bits/stdc++.h>
using namespace std;

int n, m;
vector<int> fst, snd;
// bottom -> up then true, up -> bottom then false
vector<vector<int>> adj;
vector<int> type;
// determine type

vector<bool> visited, is_selfloop;

enum Component {
    TrivialPath,
    SplitPath,
    PerfectCycle,
    SplitCycle,
    ComplexCycle,
    SelfLoop,
    EmptySelfLoop,
};

// {amt of top, saw path}
pair<int, bool> dfs(int node) {
    visited[node] = true;
    int top_amt = type[node] == 3;
    bool is_path = false;
    for (auto v : adj[node]) {
        if (visited[v]) continue;
        if (v == 0) {
            is_path = true;
        } else {
            auto [tt, ip] = dfs(v);
            top_amt += tt;
            is_path |= ip;
        }
    }
    return {top_amt, is_path};
}

Component component_type(int node) {
    if (is_selfloop[node]) return SelfLoop;

    auto [top_amt, is_path] = dfs(node);
    if (is_path) {
        if (top_amt) return SplitPath;
        return TrivialPath;
    }
    if (top_amt > 1) return ComplexCycle;
    if (top_amt) return SplitCycle;
    return PerfectCycle;
}

void solve() {
    cin >> n >> m;
    adj.assign(n + 1, {}), type.assign(n + 1, 0), visited.assign(n + 1, false), is_selfloop.assign(n + 1, false);
    int num_type[7]{};
    for (int i = 0; i < m; ++i) {
        int a, b;
        cin >> a >> b;
        if (a) type[a] = 2 * type[a];
        if (b) type[b] = 2 * type[b] + 1;
        fst.push_back(a), snd.push_back(b);
        adj[a].push_back(b), adj[b].push_back(a);
        if (a == 0 && b == 0) {
            num_type[EmptySelfLoop] += 1;
        }
        if (a == b) {
            is_selfloop[a] = true;
        }
    }
    // determine all endpoints
    for (int i = 1; i <= n; ++i) {
        if (!visited[i]) {
            num_type[component_type(i)] += 1;
        }
    }

    int req_moves = num_type[PerfectCycle];
    for (int i = 1; i <= n; ++i) {
        if (is_selfloop[i]) continue;
        req_moves += 1;
        if (type[i] == 3) req_moves += 1;
    }

    // Check if it's possible
    num_type[EmptySelfLoop] += num_type[TrivialPath];
    num_type[TrivialPath] = 0;
    if (num_type[EmptySelfLoop] == 0 &&
        (num_type[SplitPath] > 0 || num_type[PerfectCycle] > 0 ||
         num_type[SplitCycle] > 0 || num_type[ComplexCycle] > 0)) {
        cout << "-1\n";
        return;
    }
    num_type[EmptySelfLoop] += num_type[SplitPath];
    if (num_type[ComplexCycle] > 0) {
        if (num_type[EmptySelfLoop] < 2) {
            cout << "-1\n";
            return;
        }
    }
    cout << req_moves << "\n";
}

int main() {
    cin.tie(0)->sync_with_stdio(0);
    int t = 1;
    solve();
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:107:9: warning: unused variable 't' [-Wunused-variable]
  107 |     int t = 1;
      |         ^

Subtask #1
2.0 / 10.0

# Verdict Execution time Memory Grader output
1 Partially correct 0 ms 344 KB Output is partially correct
2 Partially correct 0 ms 348 KB Output is partially correct
3 Partially correct 0 ms 348 KB Output is partially correct
4 Partially correct 0 ms 348 KB Output is partially correct
5 Partially correct 1 ms 348 KB Output is partially correct
6 Correct 1 ms 348 KB Output is correct
7 Partially correct 1 ms 348 KB Output is partially correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Partially correct 0 ms 348 KB Output is partially correct

Subtask #2
2.0 / 10.0

# Verdict Execution time Memory Grader output
1 Partially correct 29 ms 7344 KB Output is partially correct
2 Partially correct 27 ms 8468 KB Output is partially correct
3 Partially correct 26 ms 7228 KB Output is partially correct
4 Partially correct 21 ms 6928 KB Output is partially correct
5 Partially correct 29 ms 8376 KB Output is partially correct

Subtask #3
5.0 / 25.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 348 KB Output is partially correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Partially correct 1 ms 344 KB Output is partially correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Partially correct 1 ms 344 KB Output is partially correct
8 Correct 0 ms 352 KB Output is correct
9 Partially correct 1 ms 344 KB Output is partially correct

Subtask #4
3.0 / 15.0

# Verdict Execution time Memory Grader output
1 Partially correct 1 ms 348 KB Output is partially correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Partially correct 1 ms 344 KB Output is partially correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Partially correct 1 ms 344 KB Output is partially correct
8 Correct 0 ms 352 KB Output is correct
9 Partially correct 1 ms 344 KB Output is partially correct
10 Partially correct 62 ms 15936 KB Output is partially correct
11 Correct 43 ms 15756 KB Output is correct
12 Correct 67 ms 15784 KB Output is correct
13 Partially correct 67 ms 15756 KB Output is partially correct
14 Correct 69 ms 16284 KB Output is correct
15 Correct 57 ms 15676 KB Output is correct
16 Partially correct 76 ms 16188 KB Output is partially correct
17 Correct 60 ms 15620 KB Output is correct
18 Partially correct 54 ms 16236 KB Output is partially correct

Subtask #5
5.0 / 25.0

# Verdict Execution time Memory Grader output
1 Partially correct 0 ms 348 KB Output is partially correct
2 Correct 1 ms 348 KB Output is correct
3 Partially correct 1 ms 348 KB Output is partially correct
4 Partially correct 0 ms 348 KB Output is partially correct
5 Correct 1 ms 604 KB Output is correct
6 Partially correct 0 ms 344 KB Output is partially correct
7 Correct 1 ms 348 KB Output is correct
8 Partially correct 1 ms 348 KB Output is partially correct
9 Partially correct 1 ms 344 KB Output is partially correct
10 Correct 1 ms 348 KB Output is correct
11 Partially correct 0 ms 348 KB Output is partially correct
12 Partially correct 0 ms 344 KB Output is partially correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Partially correct 0 ms 344 KB Output is partially correct
17 Correct 0 ms 344 KB Output is correct
18 Partially correct 1 ms 348 KB Output is partially correct
19 Partially correct 1 ms 348 KB Output is partially correct
20 Partially correct 1 ms 348 KB Output is partially correct
21 Correct 0 ms 344 KB Output is correct
22 Partially correct 1 ms 348 KB Output is partially correct
23 Correct 0 ms 344 KB Output is correct
24 Partially correct 0 ms 348 KB Output is partially correct

Subtask #6
3.0 / 15.0

# Verdict Execution time Memory Grader output
1 Partially correct 0 ms 344 KB Output is partially correct
2 Partially correct 0 ms 348 KB Output is partially correct
3 Partially correct 0 ms 348 KB Output is partially correct
4 Partially correct 0 ms 348 KB Output is partially correct
5 Partially correct 1 ms 348 KB Output is partially correct
6 Correct 1 ms 348 KB Output is correct
7 Partially correct 1 ms 348 KB Output is partially correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Partially correct 0 ms 348 KB Output is partially correct
11 Partially correct 29 ms 7344 KB Output is partially correct
12 Partially correct 27 ms 8468 KB Output is partially correct
13 Partially correct 26 ms 7228 KB Output is partially correct
14 Partially correct 21 ms 6928 KB Output is partially correct
15 Partially correct 29 ms 8376 KB Output is partially correct
16 Partially correct 1 ms 348 KB Output is partially correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Partially correct 1 ms 344 KB Output is partially correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Partially correct 1 ms 344 KB Output is partially correct
23 Correct 0 ms 352 KB Output is correct
24 Partially correct 1 ms 344 KB Output is partially correct
25 Partially correct 62 ms 15936 KB Output is partially correct
26 Correct 43 ms 15756 KB Output is correct
27 Correct 67 ms 15784 KB Output is correct
28 Partially correct 67 ms 15756 KB Output is partially correct
29 Correct 69 ms 16284 KB Output is correct
30 Correct 57 ms 15676 KB Output is correct
31 Partially correct 76 ms 16188 KB Output is partially correct
32 Correct 60 ms 15620 KB Output is correct
33 Partially correct 54 ms 16236 KB Output is partially correct
34 Partially correct 0 ms 348 KB Output is partially correct
35 Correct 1 ms 348 KB Output is correct
36 Partially correct 1 ms 348 KB Output is partially correct
37 Partially correct 0 ms 348 KB Output is partially correct
38 Correct 1 ms 604 KB Output is correct
39 Partially correct 0 ms 344 KB Output is partially correct
40 Correct 1 ms 348 KB Output is correct
41 Partially correct 1 ms 348 KB Output is partially correct
42 Partially correct 1 ms 344 KB Output is partially correct
43 Correct 1 ms 348 KB Output is correct
44 Partially correct 0 ms 348 KB Output is partially correct
45 Partially correct 0 ms 344 KB Output is partially correct
46 Correct 1 ms 344 KB Output is correct
47 Correct 1 ms 348 KB Output is correct
48 Correct 1 ms 348 KB Output is correct
49 Partially correct 0 ms 344 KB Output is partially correct
50 Correct 0 ms 344 KB Output is correct
51 Partially correct 1 ms 348 KB Output is partially correct
52 Partially correct 1 ms 348 KB Output is partially correct
53 Partially correct 1 ms 348 KB Output is partially correct
54 Correct 0 ms 344 KB Output is correct
55 Partially correct 1 ms 348 KB Output is partially correct
56 Correct 0 ms 344 KB Output is correct
57 Partially correct 0 ms 348 KB Output is partially correct
58 Partially correct 49 ms 14572 KB Output is partially correct
59 Partially correct 49 ms 15928 KB Output is partially correct
60 Partially correct 54 ms 13368 KB Output is partially correct
61 Partially correct 60 ms 14908 KB Output is partially correct
62 Correct 42 ms 16192 KB Output is correct
63 Partially correct 61 ms 15676 KB Output is partially correct
64 Correct 63 ms 16184 KB Output is correct
65 Partially correct 59 ms 15416 KB Output is partially correct
66 Partially correct 56 ms 16080 KB Output is partially correct
67 Correct 47 ms 15444 KB Output is correct
68 Partially correct 52 ms 15940 KB Output is partially correct
69 Partially correct 51 ms 15672 KB Output is partially correct
70 Correct 48 ms 15656 KB Output is correct
71 Correct 52 ms 15928 KB Output is correct
72 Correct 51 ms 15736 KB Output is correct
73 Partially correct 53 ms 16064 KB Output is partially correct
74 Correct 46 ms 15672 KB Output is correct
75 Partially correct 47 ms 15672 KB Output is partially correct
76 Partially correct 52 ms 16064 KB Output is partially correct
77 Partially correct 49 ms 15424 KB Output is partially correct
78 Correct 48 ms 15932 KB Output is correct
79 Partially correct 43 ms 15420 KB Output is partially correct
80 Correct 47 ms 15576 KB Output is correct
81 Partially correct 63 ms 15972 KB Output is partially correct