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Submission #962061

# Submission time Handle Problem Language Result Execution time Memory
962061 2024-04-13T06:32:35 Z danikoynov Dreaming (IOI13_dreaming) C++14
10 / 100
 1000 ms 12720 KB 
#include "dreaming.h"
#include<bits/stdc++.h>


using namespace std;
typedef long long ll;

const int maxn = 1e5 + 10;

vector < pair < int, int > > adj[maxn];

int used[maxn], depth[maxn];
int max_depth[maxn];
void calc(int v, int p)
{
    max_depth[v] = 0;
    for (pair < int, int > nb : adj[v])
    {
        int u = nb.first;
        if (u == p)
            continue;
        depth[u] = depth[v] + nb.second;
        calc(u, v);
        max_depth[v] = max(max_depth[v], max_depth[u] + nb.second);
    }
}
vector < int > ord;
void trav(int v, int p)
{
    ord.push_back(v);
    used[v] = 1;
    for (pair < int, int > nb : adj[v])
    {
        if (nb.first == p)
            continue;
        trav(nb.first, v);
    }
}

int dist;

void dfs(int v, int p, int lon)
{

    //cout << "dfs " << v << " " << p << " " << lon << endl;
    int val = lon, sec = 0;
    for (pair < int, int > nb : adj[v])
    {
        int u = nb.first;
        if (u == p)
            continue;
        if (max_depth[u] + nb.second > val)
        {
            sec = val;
            val = max_depth[u] + nb.second;
        }
        else if (max_depth[u] + nb.second > sec)
        {
            sec = max_depth[u] + nb.second;
        }
    }
    //cout << val << " " << sec << endl;
    dist = min(dist, val);
    if (val == lon)
        return;
    for (pair < int, int > nb : adj[v])
    {
        int u = nb.first;
        if (u == p)
            continue;
        if (val == max_depth[u] + nb.second)
        {
            dfs(u, v, sec + nb.second);
            return;
        }
    }
}
int cap;

int path[maxn];
void bfs(int v)
{
    for (int w : ord)
        path[w] = -1;
    path[v] = 0;
    queue < int > q;
    q.push(v);
    while(!q.empty())
    {
        v = q.front();
        q.pop();
        for (pair <int, int > nb : adj[v])
        {
            if (path[nb.first] == -1)
            {
                path[nb.first] = path[v] + nb.second;
                q.push(nb.first);
            }
        }
    }
}
int find_distance(int v)
{
    ord.clear();
    trav(v, -1);
    dist = 2e9;
     calc(v, -1);
     dfs(v, -1, 0);

    for (int w : ord)
    {
        calc(w, -1);
        dist = min(dist, max_depth[w]);
    }
    bfs(v);
    int ds = v;
    for (int u : ord)
        if (path[u] > path[ds])
            ds = u;
    bfs(ds);
    for (int u : ord)
        if (path[u] > cap)
            cap = path[u];
    return dist;
}


int travelTime(int N, int M, int L, int A[], int B[], int T[])
{

    for (int i = 0; i < M; i ++)
    {
        adj[A[i]].push_back({B[i], T[i]});
        adj[B[i]].push_back({A[i], T[i]});
    }

    //cout << find_distance(1) << endl;
    //exit(0);
    vector < int > values;
    for (int i = 0; i < N; i ++)
    {
        if (!used[i])
            values.push_back(find_distance(i));
    }


    //for (int cur : values)
    //cout << cur << " ";
    //cout << endl;
    sort(values.begin(), values.end());

    int sz = values.size();
    int res = values[sz - 1] + values[sz - 2] + L;
    if (sz >= 3)
        res = max(res, values[sz - 2] + values[sz - 3] + 2 * L);
    res = max(res, cap);
    return res;
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1048 ms 12720 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5208 KB Output is correct
2 Correct 1 ms 5212 KB Output is correct
3 Correct 1 ms 5212 KB Output is correct
4 Correct 2 ms 5212 KB Output is correct
5 Correct 1 ms 5212 KB Output is correct
6 Correct 2 ms 5212 KB Output is correct
7 Correct 1 ms 5212 KB Output is correct
8 Correct 2 ms 5208 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 2 ms 5208 KB Output is correct
12 Correct 1 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 2 ms 5212 KB Output is correct
15 Correct 1 ms 5212 KB Output is correct
16 Correct 1 ms 5212 KB Output is correct
17 Correct 1 ms 5212 KB Output is correct
18 Correct 2 ms 5212 KB Output is correct
19 Correct 2 ms 5212 KB Output is correct
20 Correct 1 ms 5208 KB Output is correct
21 Correct 1 ms 5212 KB Output is correct
22 Correct 1 ms 5212 KB Output is correct
23 Correct 1 ms 5288 KB Output is correct
24 Correct 1 ms 5212 KB Output is correct
25 Correct 1 ms 5212 KB Output is correct

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1048 ms 12720 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 7772 KB Output is correct
2 Correct 19 ms 7800 KB Output is correct
3 Correct 28 ms 7772 KB Output is correct
4 Correct 20 ms 7776 KB Output is correct
5 Correct 20 ms 7772 KB Output is correct
6 Correct 23 ms 8148 KB Output is correct
7 Correct 20 ms 7904 KB Output is correct
8 Correct 19 ms 7756 KB Output is correct
9 Correct 20 ms 7772 KB Output is correct
10 Correct 20 ms 7772 KB Output is correct
11 Correct 1 ms 5212 KB Output is correct
12 Correct 10 ms 5848 KB Output is correct
13 Correct 11 ms 5844 KB Output is correct
14 Correct 13 ms 6100 KB Output is correct
15 Correct 10 ms 5844 KB Output is correct
16 Correct 11 ms 5992 KB Output is correct
17 Correct 10 ms 5848 KB Output is correct
18 Correct 10 ms 5848 KB Output is correct
19 Correct 11 ms 5980 KB Output is correct
20 Incorrect 1 ms 5212 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 5208 KB Output is correct
2 Correct 1 ms 5212 KB Output is correct
3 Correct 1 ms 5212 KB Output is correct
4 Correct 2 ms 5212 KB Output is correct
5 Correct 1 ms 5212 KB Output is correct
6 Correct 2 ms 5212 KB Output is correct
7 Correct 1 ms 5212 KB Output is correct
8 Correct 2 ms 5208 KB Output is correct
9 Correct 1 ms 5212 KB Output is correct
10 Correct 1 ms 5212 KB Output is correct
11 Correct 2 ms 5208 KB Output is correct
12 Correct 1 ms 5212 KB Output is correct
13 Correct 1 ms 5212 KB Output is correct
14 Correct 2 ms 5212 KB Output is correct
15 Correct 1 ms 5212 KB Output is correct
16 Correct 1 ms 5212 KB Output is correct
17 Correct 1 ms 5212 KB Output is correct
18 Correct 2 ms 5212 KB Output is correct
19 Correct 2 ms 5212 KB Output is correct
20 Correct 1 ms 5208 KB Output is correct
21 Correct 1 ms 5212 KB Output is correct
22 Correct 1 ms 5212 KB Output is correct
23 Correct 1 ms 5288 KB Output is correct
24 Correct 1 ms 5212 KB Output is correct
25 Correct 1 ms 5212 KB Output is correct
26 Correct 2 ms 5208 KB Output is correct
27 Correct 2 ms 5212 KB Output is correct
28 Correct 3 ms 5468 KB Output is correct
29 Correct 2 ms 5212 KB Output is correct
30 Correct 2 ms 5212 KB Output is correct
31 Correct 3 ms 5468 KB Output is correct
32 Correct 2 ms 5212 KB Output is correct
33 Correct 3 ms 5212 KB Output is correct
34 Correct 4 ms 5468 KB Output is correct
35 Correct 2 ms 5212 KB Output is correct
36 Correct 1 ms 5216 KB Output is correct
37 Correct 1 ms 5212 KB Output is correct
38 Correct 1 ms 5212 KB Output is correct
39 Correct 1 ms 5212 KB Output is correct
40 Correct 1 ms 5212 KB Output is correct
41 Correct 1 ms 5212 KB Output is correct
42 Correct 1 ms 5212 KB Output is correct
43 Correct 1 ms 5212 KB Output is correct
44 Correct 1 ms 5212 KB Output is correct
45 Correct 2 ms 5212 KB Output is correct
46 Correct 1 ms 5208 KB Output is correct
47 Correct 1 ms 5212 KB Output is correct
48 Correct 1 ms 5212 KB Output is correct
49 Correct 1 ms 5212 KB Output is correct
50 Correct 2 ms 5212 KB Output is correct
51 Correct 1 ms 5212 KB Output is correct
52 Incorrect 1 ms 5212 KB Output isn't correct
53 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1048 ms 12720 KB Time limit exceeded
2 Halted 0 ms 0 KB -