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Submission #721979

# Submission time Handle Problem Language Result Execution time Memory
721979 2023-04-11T09:43:50 Z danikoynov Connecting Supertrees (IOI20_supertrees) C++14
75 / 100
 199 ms 30028 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;
int nec[maxn];
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 || (!all2 && cap[comp[i]][comp[j]] == 2))
                return false;
    memset(nec, 0, sizeof(nec));
    for (int v : comp)
        nec[v] = 1;
    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 && i != j)
                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:65:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |     for (int i = 0; i < comp.size(); i ++)
      |                     ~~^~~~~~~~~~~~~
supertrees.cpp:66:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   66 |         for (int j = 0; j < comp.size(); j ++)
      |                         ~~^~~~~~~~~~~~~
supertrees.cpp:89:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |     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 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 8 ms 2260 KB Output is correct
7 Correct 189 ms 30016 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 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 8 ms 2260 KB Output is correct
7 Correct 189 ms 30016 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 9 ms 2008 KB Output is correct
13 Correct 182 ms 26060 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 1748 KB Output is correct
17 Correct 99 ms 18620 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 46 ms 7764 KB Output is correct
21 Correct 178 ms 26556 KB Output is correct
22 Correct 180 ms 26008 KB Output is correct
23 Correct 199 ms 28116 KB Output is correct
24 Correct 189 ms 25964 KB Output is correct
25 Correct 76 ms 16572 KB Output is correct
26 Correct 71 ms 16064 KB Output is correct
27 Correct 192 ms 29252 KB Output is correct
28 Correct 177 ms 26048 KB Output is correct

Subtask #3
19.0 / 19.0

# 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 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 8 ms 2004 KB Output is correct
9 Correct 168 ms 26056 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 8 ms 2132 KB Output is correct
13 Correct 179 ms 30028 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 5 ms 1652 KB Output is correct
17 Correct 88 ms 18504 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 44 ms 7744 KB Output is correct
22 Correct 172 ms 26556 KB Output is correct
23 Correct 173 ms 26048 KB Output is correct
24 Correct 190 ms 29116 KB Output is correct
25 Correct 74 ms 16076 KB Output is correct
26 Correct 75 ms 16588 KB Output is correct
27 Correct 166 ms 26020 KB Output is correct
28 Correct 197 ms 28096 KB Output is correct
29 Correct 70 ms 16060 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 47 ms 7752 KB Output is correct
5 Correct 180 ms 26564 KB Output is correct
6 Correct 174 ms 26064 KB Output is correct
7 Correct 190 ms 28108 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 44 ms 7756 KB Output is correct
10 Correct 176 ms 26572 KB Output is correct
11 Correct 168 ms 26060 KB Output is correct
12 Correct 182 ms 29136 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 46 ms 7764 KB Output is correct
17 Correct 175 ms 26556 KB Output is correct
18 Correct 180 ms 26448 KB Output is correct
19 Correct 172 ms 26188 KB Output is correct
20 Correct 176 ms 26044 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 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 8 ms 2260 KB Output is correct
7 Correct 189 ms 30016 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 9 ms 2008 KB Output is correct
13 Correct 182 ms 26060 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 1748 KB Output is correct
17 Correct 99 ms 18620 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 46 ms 7764 KB Output is correct
21 Correct 178 ms 26556 KB Output is correct
22 Correct 180 ms 26008 KB Output is correct
23 Correct 199 ms 28116 KB Output is correct
24 Correct 189 ms 25964 KB Output is correct
25 Correct 76 ms 16572 KB Output is correct
26 Correct 71 ms 16064 KB Output is correct
27 Correct 192 ms 29252 KB Output is correct
28 Correct 177 ms 26048 KB Output is correct
29 Correct 1 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 Correct 0 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 8 ms 2004 KB Output is correct
37 Correct 168 ms 26056 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 8 ms 2132 KB Output is correct
41 Correct 179 ms 30028 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 5 ms 1652 KB Output is correct
45 Correct 88 ms 18504 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 44 ms 7744 KB Output is correct
50 Correct 172 ms 26556 KB Output is correct
51 Correct 173 ms 26048 KB Output is correct
52 Correct 190 ms 29116 KB Output is correct
53 Correct 74 ms 16076 KB Output is correct
54 Correct 75 ms 16588 KB Output is correct
55 Correct 166 ms 26020 KB Output is correct
56 Correct 197 ms 28096 KB Output is correct
57 Correct 70 ms 16060 KB Output is correct
58 Incorrect 1 ms 340 KB Answer gives possible 1 while actual possible 0
59 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 0 ms 340 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 8 ms 2260 KB Output is correct
7 Correct 189 ms 30016 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 0 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 9 ms 2008 KB Output is correct
13 Correct 182 ms 26060 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 4 ms 1748 KB Output is correct
17 Correct 99 ms 18620 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 46 ms 7764 KB Output is correct
21 Correct 178 ms 26556 KB Output is correct
22 Correct 180 ms 26008 KB Output is correct
23 Correct 199 ms 28116 KB Output is correct
24 Correct 189 ms 25964 KB Output is correct
25 Correct 76 ms 16572 KB Output is correct
26 Correct 71 ms 16064 KB Output is correct
27 Correct 192 ms 29252 KB Output is correct
28 Correct 177 ms 26048 KB Output is correct
29 Correct 1 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 Correct 0 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 8 ms 2004 KB Output is correct
37 Correct 168 ms 26056 KB Output is correct
38 Correct 0 ms 340 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 8 ms 2132 KB Output is correct
41 Correct 179 ms 30028 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 5 ms 1652 KB Output is correct
45 Correct 88 ms 18504 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 0 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 44 ms 7744 KB Output is correct
50 Correct 172 ms 26556 KB Output is correct
51 Correct 173 ms 26048 KB Output is correct
52 Correct 190 ms 29116 KB Output is correct
53 Correct 74 ms 16076 KB Output is correct
54 Correct 75 ms 16588 KB Output is correct
55 Correct 166 ms 26020 KB Output is correct
56 Correct 197 ms 28096 KB Output is correct
57 Correct 70 ms 16060 KB Output is correct
58 Correct 1 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 47 ms 7752 KB Output is correct
62 Correct 180 ms 26564 KB Output is correct
63 Correct 174 ms 26064 KB Output is correct
64 Correct 190 ms 28108 KB Output is correct
65 Correct 0 ms 340 KB Output is correct
66 Correct 44 ms 7756 KB Output is correct
67 Correct 176 ms 26572 KB Output is correct
68 Correct 168 ms 26060 KB Output is correct
69 Correct 182 ms 29136 KB Output is correct
70 Correct 1 ms 340 KB Output is correct
71 Correct 1 ms 340 KB Output is correct
72 Correct 1 ms 340 KB Output is correct
73 Correct 46 ms 7764 KB Output is correct
74 Correct 175 ms 26556 KB Output is correct
75 Correct 180 ms 26448 KB Output is correct
76 Correct 172 ms 26188 KB Output is correct
77 Correct 176 ms 26044 KB Output is correct
78 Incorrect 1 ms 340 KB Answer gives possible 1 while actual possible 0
79 Halted 0 ms 0 KB -