oj.uz

Submission #927690

# Submission time Handle Problem Language Result Execution time Memory
927690 2024-02-15T08:46:03 Z haxorman Connecting Supertrees (IOI20_supertrees) C++14
56 / 100
 185 ms 23876 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;

const int mxN = 1007;

int dsu[mxN][2];
bool mark[mxN], done[mxN];
vector<int> cmp[mxN][2];

int find(int x, int id) {
    return dsu[x][id] < 0 ? x : dsu[x][id] = find(dsu[x][id], id);
}

bool unite(int x, int y, int id) {
    x = find(x, id), y = find(y, id);

    if (x == y) {
        return false;
    }

    if (dsu[x][id] > dsu[y][id]) {
        swap(x, y);
    }
    dsu[x][id] += dsu[y][id];
    dsu[y][id] = x;

    for (auto c : cmp[y][id]) {
        cmp[x][id].push_back(c);
    }

    return true;
}

int construct(vector<vector<int>> p) {
	int n = p.size();
    memset(dsu, -1, sizeof(dsu));
    vector<vector<int>> ans(n, vector<int>(n));
    
    for (int i = 0; i < n; ++i) {
        cmp[i][0].push_back(i);
        cmp[i][1].push_back(i);
    }

    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            if (p[i][j] == 1) {
                if (unite(i, j, 0)) {
                    ans[i][j] = ans[j][i] = 1;
                }
            } 
        }
    }

    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            if (!p[i][j] && find(i, 0) == find(j, 0)) {
                return 0;
            } 
        }
    }
    
    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            if (p[i][j] == 2) {
                int x = find(i, 0), y = find(j, 0);
                if (x == y) {
                    return 0;
                }

                if (find(x, 1) == find(y, 1)) {
                    continue;
                }

                for (auto u : cmp[x][0]) {
                    for (auto v : cmp[y][0]) {
                        if (p[u][v] != 2) {
                            return 0;
                        }
                    }
                }
                unite(x, y, 1);
            }
        }
    }

    for (int i = 0; i < n; ++i) {
        int x = find(i, 0);
        int z = find(x, 1);
        if (done[z] || cmp[z][1].size() == 1) {
            continue;
        }

        if (cmp[z][1].size() == 2) {
            return 0;
        } 

        for (int j = 0; j < cmp[z][1].size() - 1; ++j) {
            int a = cmp[z][1][j], b = cmp[z][1][j+1];
            ans[a][b] = ans[b][a] = 1;
        }
        int a = cmp[z][1][0], b = cmp[z][1].back();
        ans[a][b] = ans[b][a] = 1;
    }
    build(ans);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:98:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   98 |         for (int j = 0; j < cmp[z][1].size() - 1; ++j) {
      |                         ~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1368 KB Output is correct
7 Correct 158 ms 22956 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1368 KB Output is correct
7 Correct 158 ms 22956 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 1456 KB Output is correct
13 Correct 155 ms 23636 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 74 ms 13636 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 40 ms 6316 KB Output is correct
21 Correct 166 ms 23876 KB Output is correct
22 Correct 161 ms 23620 KB Output is correct
23 Correct 184 ms 23608 KB Output is correct
24 Correct 155 ms 23848 KB Output is correct
25 Correct 68 ms 13820 KB Output is correct
26 Correct 68 ms 14124 KB Output is correct
27 Correct 166 ms 23636 KB Output is correct
28 Correct 156 ms 23632 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 7 ms 1372 KB Output is correct
9 Correct 153 ms 22600 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 7 ms 1372 KB Output is correct
13 Correct 158 ms 22820 KB Output is correct
14 Incorrect 0 ms 344 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 43 ms 6304 KB Output is correct
5 Correct 155 ms 23536 KB Output is correct
6 Correct 157 ms 23736 KB Output is correct
7 Correct 178 ms 23636 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 39 ms 6484 KB Output is correct
10 Correct 185 ms 23580 KB Output is correct
11 Correct 154 ms 23376 KB Output is correct
12 Correct 175 ms 23540 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 42 ms 6356 KB Output is correct
17 Correct 163 ms 23804 KB Output is correct
18 Correct 162 ms 23724 KB Output is correct
19 Correct 158 ms 23568 KB Output is correct
20 Correct 179 ms 23744 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1368 KB Output is correct
7 Correct 158 ms 22956 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 1456 KB Output is correct
13 Correct 155 ms 23636 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 74 ms 13636 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 40 ms 6316 KB Output is correct
21 Correct 166 ms 23876 KB Output is correct
22 Correct 161 ms 23620 KB Output is correct
23 Correct 184 ms 23608 KB Output is correct
24 Correct 155 ms 23848 KB Output is correct
25 Correct 68 ms 13820 KB Output is correct
26 Correct 68 ms 14124 KB Output is correct
27 Correct 166 ms 23636 KB Output is correct
28 Correct 156 ms 23632 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1372 KB Output is correct
37 Correct 153 ms 22600 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 7 ms 1372 KB Output is correct
41 Correct 158 ms 22820 KB Output is correct
42 Incorrect 0 ms 344 KB Answer gives possible 1 while actual possible 0
43 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 7 ms 1368 KB Output is correct
7 Correct 158 ms 22956 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 7 ms 1456 KB Output is correct
13 Correct 155 ms 23636 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 860 KB Output is correct
17 Correct 74 ms 13636 KB Output is correct
18 Correct 0 ms 344 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 40 ms 6316 KB Output is correct
21 Correct 166 ms 23876 KB Output is correct
22 Correct 161 ms 23620 KB Output is correct
23 Correct 184 ms 23608 KB Output is correct
24 Correct 155 ms 23848 KB Output is correct
25 Correct 68 ms 13820 KB Output is correct
26 Correct 68 ms 14124 KB Output is correct
27 Correct 166 ms 23636 KB Output is correct
28 Correct 156 ms 23632 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 344 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 7 ms 1372 KB Output is correct
37 Correct 153 ms 22600 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 1 ms 348 KB Output is correct
40 Correct 7 ms 1372 KB Output is correct
41 Correct 158 ms 22820 KB Output is correct
42 Incorrect 0 ms 344 KB Answer gives possible 1 while actual possible 0
43 Halted 0 ms 0 KB -