oj.uz

Submission #751007

# Submission time Handle Problem Language Result Execution time Memory
751007 2023-05-30T19:18:16 Z inventiontime Spring cleaning (CEOI20_cleaning) C++17
34 / 100
 1000 ms 19244 KB 
#include <bits/stdc++.h>
using namespace std;

#define int ll
#define endl '\n' //comment for interactive
#define fast_io ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)

#define pb push_back
#define re resize
#define ff first
#define ss second

#define all(x) (x).begin(), (x).end()
#define all1(x) (x).begin()+1, (x).end()
#define loop(i, n) for(int i = 0; i < n; i++)
#define loop1(i, n) for(int i = 1; i <= n; i++)

#define print(x) cout << #x << ": " << x << endl << flush

typedef long long ll;
typedef vector<int> vi;
typedef array<int, 2> ii;
typedef array<int, 3> ti;
typedef vector<ii> vii;
typedef vector<ti> vti;
typedef vector<vi> vvi;
typedef priority_queue<int> pq;

template<class T> bool ckmin(T&a, T b) { bool B = a > b; a = min(a, b); return B; }
template<class T> bool ckmax(T&a, T b) { bool B = a < b; a = max(a, b); return B; }

const int inf = 1e17;
const int maxn = 2e5+5;

vi adj[maxn];

void solve() {

    int n, q;
    cin >> n >> q;
    loop1(i, n-1) {
        int u, v;
        cin >> u >> v;
        adj[u].pb(v);
        adj[v].pb(u);
    }

    while(q--) {
        int d; cin >> d;
        vi a(d+1);
        loop1(i, d) cin >> a[i];
        loop1(i, d) {
            adj[a[i]].pb(n+i);
            adj[n+i].pb(a[i]);
        }

        vi lv(n+d+1);
        int res = 0;
        auto dfs = [&] (int u, int p, auto dfs) -> void {
            for(auto v : adj[u]) if(v != p) {
                dfs(v, u, dfs);
                lv[u] += lv[v];
            }
            if(adj[u].size() == 1) lv[u] += 1;
            if(u != p) res += 1 + !(lv[u] & 1);
        };
        dfs(1, 1, dfs);

        if(lv[1] & 1) cout << -1 << endl;
        else cout << res << endl;

        loop1(i, d) {
            adj[a[i]].pop_back();
            adj[n+i].pop_back();
        }
    }

}

signed main() {

    fast_io;

    int t = 1; //cin >> t;
    while(t--)
        solve();

    return 0;

}

Subtask #1
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Execution timed out 1079 ms 6496 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #2
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 10068 KB Output is correct
2 Correct 23 ms 10068 KB Output is correct
3 Correct 29 ms 10164 KB Output is correct
4 Correct 51 ms 14084 KB Output is correct
5 Correct 60 ms 15516 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 22 ms 10512 KB Output is correct
2 Correct 20 ms 10452 KB Output is correct
3 Correct 42 ms 13460 KB Output is correct
4 Correct 78 ms 19244 KB Output is correct
5 Correct 39 ms 13372 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 264 ms 6796 KB Output is correct
2 Correct 166 ms 6360 KB Output is correct
3 Correct 232 ms 6152 KB Output is correct
4 Correct 258 ms 6356 KB Output is correct
5 Correct 229 ms 6672 KB Output is correct
6 Correct 270 ms 6860 KB Output is correct

Subtask #5
0 / 19.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1079 ms 8544 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1039 ms 9780 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4948 KB Output is correct
2 Execution timed out 1079 ms 6496 KB Time limit exceeded
3 Halted 0 ms 0 KB -