oj.uz

Submission #870083

# Submission time Handle Problem Language Result Execution time Memory
870083 2023-11-06T22:27:45 Z StefanL2005 Dreaming (IOI13_dreaming) C++14
18 / 100
 496 ms 16876 KB 
#include <bits/stdc++.h>
#include "dreaming.h"
using namespace std;
int k = 0;
 
void DFS_sum(int node, int p, vector<int> &sum, vector<vector<int>> &vec, vector<vector<int>> &cost, vector<int> &col)
{
    col[node] = k;
    for (int i = 0; i < vec[node].size(); i++)
    {
        if (vec[node][i] == p)
            continue;
 
        DFS_sum(vec[node][i], node, sum, vec, cost, col);
        sum[node] = max(sum[node], sum[vec[node][i]] + cost[node][i]);
    }
}

void DFS_main(int node, int p, int main, int sec, vector<int> &sum, int &ans, vector<vector<int>> &vec, vector<vector<int>> &cost)
{
    ans = min(ans, max(main, sec));
    if (sec > main)
        return;
    int nr = 0;
    for (int i = 0; i < vec[node].size(); i++)
    {
        if (vec[node][i] == p)
            continue;
        int temp = sum[vec[node][i]] + cost[node][i];

        if (temp == main)
        {
            nr++;
            continue;
        }
        if (temp > sec && (temp != main || nr >= 1))
            sec = temp; 
    }

    for (int i = 0; i < vec[node].size(); i++)
    {
        if (vec[node][i] == p)
            continue;
        int temp = sum[vec[node][i]] + cost[node][i];

        if (temp == main)
            DFS_main(vec[node][i], node, main - cost[node][i], sec + cost[node][i], sum, ans, vec, cost);
    }
}
 
int graph_hub(int node, vector<vector<int>> &vec, vector<vector<int>> &cost, vector<int> &col)
{
    vector<int> sum(vec.size(), 0);
    DFS_sum(node, -1, sum, vec, cost, col);
    
    int MAX = 0, sec = 0;
    for (int i = 0; i < vec[node].size(); i++)
    {
        int temp = sum[vec[node][i]] + cost[node][i];
 
        if (temp > MAX)
        {
            sec = MAX;
            MAX = temp;
        }
        else
            sec = max(sec, temp);
    }

    int ans = sum[node];
    DFS_main(node, -1, MAX, sec, sum, ans, vec, cost);

    return ans;
}
int travelTime(int N, int M, int L, int A[], int B[], int C[])
{
    vector<int> col(N, -1);
    vector<vector<int>> vec(N), cost(N);
    for (int i = 0; i < M; i++)
    {
        vec[A[i]].push_back(B[i]);
        vec[B[i]].push_back(A[i]);
        cost[A[i]].push_back(C[i]);
        cost[B[i]].push_back(C[i]);
    }

    if (M == N - 1)
    {
        vector<int> sum(N, 0);
        DFS_sum(0, -1, sum, vec, cost, col);
 
        int unos = 0, dos = 0;
 
        for (int i = 0; i < vec[0].size(); i++)
       {
            int temp = sum[vec[0][i]] + cost[0][i];
            if (temp > unos)
            {
                dos = unos;
                unos = temp;
             }
            else
                dos = max(dos, temp);
        }
        return unos + dos;
    }

    vector<int> hub_l;
    for (int i = 0; i < N; i++)
        if (col[i] == -1)
        {
            hub_l.push_back(graph_hub(i, vec, cost, col));
            k++;
        }
    
    int unos = 0, dos = 0, tres = 0;

    for (int i = 0; i < hub_l.size(); i++)
    {
        int p = hub_l[i];

        if (p > unos)
        {
            tres = dos;
            dos = unos;
            unos = p;
        }
        else
            if (p > dos)
            {
                tres = dos;
                dos = p;
            }
            else
                tres = max(tres, p);
    }
    
    if (M == N - 2)
        return unos + L + dos;
    return max(unos + L + dos, dos + 2 * L + tres);
}

Compilation message

dreaming.cpp: In function 'void DFS_sum(int, int, std::vector<int>&, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&, std::vector<int>&)':
dreaming.cpp:9:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for (int i = 0; i < vec[node].size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~~~
dreaming.cpp: In function 'void DFS_main(int, int, int, int, std::vector<int>&, int&, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&)':
dreaming.cpp:25:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for (int i = 0; i < vec[node].size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~~~
dreaming.cpp:40:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |     for (int i = 0; i < vec[node].size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~~~
dreaming.cpp: In function 'int graph_hub(int, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&, std::vector<int>&)':
dreaming.cpp:57:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |     for (int i = 0; i < vec[node].size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~~~
dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:94:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   94 |         for (int i = 0; i < vec[0].size(); i++)
      |                         ~~^~~~~~~~~~~~~~~
dreaming.cpp:118:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |     for (int i = 0; i < hub_l.size(); i++)
      |                     ~~^~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 42 ms 16876 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 42 ms 16876 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 298 ms 10400 KB Output is correct
2 Correct 290 ms 10400 KB Output is correct
3 Correct 275 ms 10208 KB Output is correct
4 Correct 292 ms 10196 KB Output is correct
5 Correct 277 ms 10212 KB Output is correct
6 Correct 341 ms 10800 KB Output is correct
7 Correct 325 ms 10820 KB Output is correct
8 Correct 300 ms 10188 KB Output is correct
9 Correct 262 ms 9900 KB Output is correct
10 Correct 311 ms 10764 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 444 ms 6464 KB Output is correct
13 Correct 468 ms 6604 KB Output is correct
14 Correct 452 ms 6472 KB Output is correct
15 Correct 457 ms 6236 KB Output is correct
16 Correct 453 ms 6600 KB Output is correct
17 Correct 462 ms 6432 KB Output is correct
18 Correct 496 ms 6600 KB Output is correct
19 Correct 459 ms 6328 KB Output is correct
20 Correct 0 ms 600 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 1 ms 604 KB Output is correct
23 Correct 454 ms 6460 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 42 ms 16876 KB Output isn't correct
2 Halted 0 ms 0 KB -