oj.uz

Submission #852945

# Submission time Handle Problem Language Result Execution time Memory
852945 2023-09-23T08:48:45 Z danikoynov Meetings 2 (JOI21_meetings2) C++14
20 / 100
 4000 ms 18324 KB 
/**
 ____ ____ ____ ____ ____ ____
||l |||e |||i |||n |||a |||d ||
||__|||__|||__|||__|||__|||__||
|/__\|/__\|/__\|/__\|/__\|/__\|

**/

#include<bits/stdc++.h>
#define endl '\n'

using namespace std;
typedef long long ll;

void speed()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}

const int maxn = 2e5 + 10;

int n;
vector < int > adj[maxn];
int order[maxn], tin[maxn], tout[maxn];
int timer, depth[maxn], sub[maxn];

void euler(int v, int p)
{
    order[++ timer] = v;
    tin[v] = timer;

    sub[v] = 1;
    for (int u : adj[v])
    {
        if (u == p)
            continue;
        depth[u] = depth[v] + 1;
        euler(u, v);
        sub[v] += sub[u];
    }

    tout[v] = timer;
}

vector < int > path;
int max_chain[maxn], virtual_depth[maxn], virtual_sub[maxn];
int act[maxn];

void dfs(int v, int p)
{
    for (int cur : path)
    {
        int id = 2 * min(virtual_sub[cur], sub[v]);
        max_chain[id] = max(max_chain[id], depth[v] - depth[cur]);
        ///cout << "here " << v << " " << cur << " " << virtual_sub[cur] << " " << sub[v] << endl;
    }
    path.push_back(v);
    virtual_depth[v] = -depth[v];

    for (int u : adj[v])
    {
        if (u == p)
            continue;
        virtual_sub[v] = n - sub[u];
        dfs(u, v);
    }
    int max_len = -1;
    for (int i = 1; i < tin[v]; i ++)
    {
        if (act[order[i]] && sub[order[i]] >= sub[v])
        {
            max_len = max(max_len, depth[v] + virtual_depth[order[i]]);
            ///int id = 2 * min(sub[v], sub[order[i]]);
            //cout << v << " : " << order[i] << " " << depth[v] + virtual_depth[order[i]] << " " << id << endl;
            ///max_chain[id] = max(max_chain[id], depth[v] + virtual_depth[order[i]]);
        }
    }
    max_chain[2 * sub[v]] = max(max_chain[2 * sub[v]], max_len);

    for (int i = tin[v]; i <= tout[v]; i ++)
        virtual_depth[order[i]] += 2;
    path.pop_back();
    act[v] = 1;
}
void solve()
{
    cin >> n;
    for (int i = 1; i < n; i ++)
    {
        int v, u;
        cin >> v >> u;
        adj[v].push_back(u);
        adj[u].push_back(v);
    }

    euler(1, 0);
    for (int i = 1; i <= n; i ++)
    {
        max_chain[i] = -1;
    }

    dfs(1, 0);

    for (int i = 1; i <= n; i ++)
    {
        act[i] = 0;
        reverse(adj[i].begin(), adj[i].end());
    }
    euler(1, 0);
    dfs(1, 0);

    for (int i = n; i > 0; i --)
    {
        max_chain[i] = max(max_chain[i], max_chain[i + 1]);
    }

    for (int i = 1; i <= n; i ++)
    {
        if (i % 2 == 1)
            cout << 1 << endl;
        else
            cout << max_chain[i] + 1 << endl;
    }
}

int main()
{
    speed();
    solve();
    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9816 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 3 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 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 2 ms 9820 KB Output is correct
11 Correct 2 ms 9912 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9820 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 2 ms 9820 KB Output is correct
18 Correct 2 ms 9820 KB Output is correct
19 Correct 2 ms 9820 KB Output is correct
20 Correct 2 ms 9820 KB Output is correct
21 Correct 2 ms 9820 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9816 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 3 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 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 2 ms 9820 KB Output is correct
11 Correct 2 ms 9912 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9820 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 2 ms 9820 KB Output is correct
18 Correct 2 ms 9820 KB Output is correct
19 Correct 2 ms 9820 KB Output is correct
20 Correct 2 ms 9820 KB Output is correct
21 Correct 2 ms 9820 KB Output is correct
22 Correct 55 ms 10172 KB Output is correct
23 Correct 57 ms 10072 KB Output is correct
24 Correct 52 ms 10172 KB Output is correct
25 Correct 54 ms 10072 KB Output is correct
26 Correct 51 ms 10076 KB Output is correct
27 Correct 58 ms 10076 KB Output is correct
28 Correct 56 ms 10072 KB Output is correct
29 Correct 66 ms 10320 KB Output is correct
30 Correct 57 ms 10076 KB Output is correct
31 Correct 53 ms 10172 KB Output is correct
32 Correct 58 ms 10292 KB Output is correct
33 Correct 61 ms 10328 KB Output is correct
34 Correct 47 ms 10072 KB Output is correct
35 Correct 46 ms 10076 KB Output is correct
36 Correct 46 ms 10204 KB Output is correct
37 Correct 42 ms 10196 KB Output is correct
38 Correct 44 ms 10284 KB Output is correct

Subtask #3
0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 9820 KB Output is correct
2 Correct 2 ms 9820 KB Output is correct
3 Correct 2 ms 9816 KB Output is correct
4 Correct 2 ms 9820 KB Output is correct
5 Correct 3 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 9820 KB Output is correct
9 Correct 2 ms 9820 KB Output is correct
10 Correct 2 ms 9820 KB Output is correct
11 Correct 2 ms 9912 KB Output is correct
12 Correct 2 ms 9820 KB Output is correct
13 Correct 2 ms 9820 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 2 ms 9820 KB Output is correct
18 Correct 2 ms 9820 KB Output is correct
19 Correct 2 ms 9820 KB Output is correct
20 Correct 2 ms 9820 KB Output is correct
21 Correct 2 ms 9820 KB Output is correct
22 Correct 55 ms 10172 KB Output is correct
23 Correct 57 ms 10072 KB Output is correct
24 Correct 52 ms 10172 KB Output is correct
25 Correct 54 ms 10072 KB Output is correct
26 Correct 51 ms 10076 KB Output is correct
27 Correct 58 ms 10076 KB Output is correct
28 Correct 56 ms 10072 KB Output is correct
29 Correct 66 ms 10320 KB Output is correct
30 Correct 57 ms 10076 KB Output is correct
31 Correct 53 ms 10172 KB Output is correct
32 Correct 58 ms 10292 KB Output is correct
33 Correct 61 ms 10328 KB Output is correct
34 Correct 47 ms 10072 KB Output is correct
35 Correct 46 ms 10076 KB Output is correct
36 Correct 46 ms 10204 KB Output is correct
37 Correct 42 ms 10196 KB Output is correct
38 Correct 44 ms 10284 KB Output is correct
39 Execution timed out 4021 ms 18324 KB Time limit exceeded
40 Halted 0 ms 0 KB -