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Submission #244640

# Submission time Handle Problem Language Result Execution time Memory
244640 2020-07-04T13:21:07 Z santaclaus03 Railway (BOI17_railway) C++14
0 / 100
 1000 ms 11000 KB 
#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
using ii = pair<int, int>;
using vb = vector<bool>;
using vvi = vector<vi>;
using vii = vector<ii>;

vector<vii> tree;
vi req;
vb connect;

bool dfs(int u, int p) {
    bool ans = connect[u];
    for (ii & e : tree[u]) {
        if (e.second != p && dfs(e.second, u)) {
            ans = true;
            req[e.first]++;
        }
    }
    return ans;
}

int main() {
    int n, m, k; cin >> n >> m >> k;
    tree.resize(n), req.resize(n - 1);
    for (int i = 0; i < n - 1; ++i) {
        int a, b; cin >> a >> b; a--; b--;
        tree[a].emplace_back(i, b);
        tree[b].emplace_back(i, a);
    }
    for (int i = 0; i < m; ++i) {
        int s; cin >> s;
        connect.assign(s, 0);
        int c;
        for (int j = 0; j < s; ++j) {
            cin >> c; c--;
            connect[c] = 1;
        }
        dfs(c, -1);
    }
    vi ans;
    for (int i = 0; i < n - 1; ++i) {
        if (req[i] >= k) ans.push_back(i + 1);
    }
    cout << ans.size() << endl;
    for (int e : ans) cout << e << " ";
    cout << endl;
  	return 0;
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Runtime error 56 ms 1916 KB Execution killed with signal 11 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Runtime error 56 ms 1916 KB Execution killed with signal 11 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1096 ms 11000 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1093 ms 8952 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1093 ms 8952 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Runtime error 56 ms 1916 KB Execution killed with signal 11 (could be triggered by violating memory limits)
3 Halted 0 ms 0 KB -