oj.uz

Submission #721969

# Submission time Handle Problem Language Result Execution time Memory
721969 2023-04-11T09:30:24 Z danikoynov Connecting Supertrees (IOI20_supertrees) C++14
56 / 100
 202 ms 30024 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
const int maxn = 1010;

vector < int > graph[maxn], graph2[maxn], comp;
int cap[maxn][maxn];
int used[maxn], N;
vector<std::vector<int>> answer;

void dfs2(int v)
{
    comp.push_back(v);
    used[v] = 1;
    for (int u : graph2[v])
    {
        if (!used[u])
            dfs2(u);
    }
}

void dfs(int v)
{
    comp.push_back(v);
    used[v] = 1;
    for (int u : graph[v])
    {
        if (!used[u])
            dfs(u);
    }
}

bool solve_2_component()
{
    /**for (int i = 0; i < comp.size(); i ++)
        for (int j = 0; j < comp.size(); j ++)
            if (cap[comp[i]][comp[j]] != 2)
                return false;

    if (comp.size() == 2)
        return false;*/
    if (comp.size() == 1)
        return true;
    answer[comp[0]][comp.back()] = 1;
    answer[comp.back()][comp[0]] = 1;


    for (int i = 0; i < (int)(comp.size()) - 1; i ++)
    {
        answer[comp[i]][comp[i + 1]] = 1;
        answer[comp[i + 1]][comp[i]] = 1;
    }

    /**for (int i = 0; i < comp.size(); i ++)
        for (int j = 0; j < comp.size(); j ++)
            cap[comp[i]][comp[j]] = 0;*/

    return true;

}
bool all2;
bool solve_component()
{
    for (int i = 0; i < comp.size(); i ++)
        for (int j = 0; j < comp.size(); j ++)
            if (cap[comp[i]][comp[j]] == 0)
                return false;

    if (comp.size() != 1 && all2)
    {
        if (cap[comp[0]][comp[1]] == 2)
        {
            if (comp.size() == 2)
                return false;
            answer[comp[0]][comp.back()] = 1;
            answer[comp.back()][comp[0]] = 1;
        }
    }

    for (int i = 0; i < (int)(comp.size()) - 1; i ++)
    {
        answer[comp[i]][comp[i + 1]] = 1;
        answer[comp[i + 1]][comp[i]] = 1;
    }

    for (int i = 1; i < comp.size(); i ++)
        for (int j = 0; j < N; j ++)
            if (cap[comp[i]][j] == 2)
            {
                cap[comp[i]][j] = 0;
                cap[j][comp[i]] = 0;
            }

    return true;

}
int construct(std::vector<std::vector<int>> p)
{
    int n = p.size();
    N = n;
    all2 = true;
    for (int i = 0; i < n; i++)
    {
        std::vector<int> row;
        row.resize(n, 0);
        answer.push_back(row);
    }

    for (int i = 0; i < n; i ++)
        for (int j = 0; j < n; j ++)
        {
            if (p[i][j] == 1)
                all2 = false;
            cap[i][j] = p[i][j];
        }



    for (int i = 0; i < n; i ++)
        for (int j = 0; j < n; j ++)
        {
            if (i != j && (cap[i][j] == 1 || (cap[i][j] == 2 && all2)))
                graph[i].push_back(j);
        }

    for (int i = 0; i < n; i ++)
    {
        if (!used[i])
        {
            comp.clear();
            dfs(i);
            bool is_fine = solve_component();
            if (!is_fine)
                return 0;
        }
    }
    if (!all2)
    {

        memset(used, 0, sizeof(used));
        for (int i = 0; i < n; i ++)
            for (int j = 0; j < n; j ++)
            {
                if (i != j && cap[i][j] == 2)
                    graph2[i].push_back(j);
            }

        for (int i = 0; i < n; i ++)
        {
            if (!used[i])
            {
                comp.clear();
                dfs2(i);
                bool is_fine = solve_2_component();
                if (!is_fine)
                    return false;
            }
        }
    }
    build(answer);
    return 1;
}

Compilation message

supertrees.cpp: In function 'bool solve_component()':
supertrees.cpp:64:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |     for (int i = 0; i < comp.size(); i ++)
      |                     ~~^~~~~~~~~~~~~
supertrees.cpp:65:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for (int j = 0; j < comp.size(); j ++)
      |                         ~~^~~~~~~~~~~~~
supertrees.cpp:86:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |     for (int i = 1; i < comp.size(); i ++)
      |                     ~~^~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 10 ms 2260 KB Output is correct
7 Correct 185 ms 30024 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 10 ms 2260 KB Output is correct
7 Correct 185 ms 30024 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 8 ms 2004 KB Output is correct
13 Correct 174 ms 26148 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 5 ms 1620 KB Output is correct
17 Correct 87 ms 18552 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 49 ms 7776 KB Output is correct
21 Correct 178 ms 26556 KB Output is correct
22 Correct 184 ms 25992 KB Output is correct
23 Correct 195 ms 28072 KB Output is correct
24 Correct 181 ms 26052 KB Output is correct
25 Correct 80 ms 16588 KB Output is correct
26 Correct 76 ms 16072 KB Output is correct
27 Correct 197 ms 29052 KB Output is correct
28 Correct 175 ms 25944 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Incorrect 0 ms 340 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 46 ms 7728 KB Output is correct
5 Correct 176 ms 26572 KB Output is correct
6 Correct 182 ms 26212 KB Output is correct
7 Correct 181 ms 28028 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 46 ms 7748 KB Output is correct
10 Correct 178 ms 26548 KB Output is correct
11 Correct 175 ms 26188 KB Output is correct
12 Correct 202 ms 29120 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 44 ms 7784 KB Output is correct
17 Correct 174 ms 26480 KB Output is correct
18 Correct 172 ms 26316 KB Output is correct
19 Correct 191 ms 26188 KB Output is correct
20 Correct 174 ms 25936 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 10 ms 2260 KB Output is correct
7 Correct 185 ms 30024 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 8 ms 2004 KB Output is correct
13 Correct 174 ms 26148 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 5 ms 1620 KB Output is correct
17 Correct 87 ms 18552 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 49 ms 7776 KB Output is correct
21 Correct 178 ms 26556 KB Output is correct
22 Correct 184 ms 25992 KB Output is correct
23 Correct 195 ms 28072 KB Output is correct
24 Correct 181 ms 26052 KB Output is correct
25 Correct 80 ms 16588 KB Output is correct
26 Correct 76 ms 16072 KB Output is correct
27 Correct 197 ms 29052 KB Output is correct
28 Correct 175 ms 25944 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Incorrect 0 ms 340 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 10 ms 2260 KB Output is correct
7 Correct 185 ms 30024 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 8 ms 2004 KB Output is correct
13 Correct 174 ms 26148 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 5 ms 1620 KB Output is correct
17 Correct 87 ms 18552 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 49 ms 7776 KB Output is correct
21 Correct 178 ms 26556 KB Output is correct
22 Correct 184 ms 25992 KB Output is correct
23 Correct 195 ms 28072 KB Output is correct
24 Correct 181 ms 26052 KB Output is correct
25 Correct 80 ms 16588 KB Output is correct
26 Correct 76 ms 16072 KB Output is correct
27 Correct 197 ms 29052 KB Output is correct
28 Correct 175 ms 25944 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 0 ms 340 KB Output is correct
32 Incorrect 0 ms 340 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -