oj.uz

Submission #301415

# Submission time Handle Problem Language Result Execution time Memory
301415 2020-09-17T22:56:03 Z cuom1999 Connecting Supertrees (IOI20_supertrees) C++14
46 / 100
 261 ms 30200 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;


struct Solver {
    int n;
    vector<bool> vs;
    vector<int> lineIndex;
    vector<vector<int>> p, line, cycle;

    Solver(vector<vector<int>> p): p(p), n(p.size()) {
        vs.resize(n);
        lineIndex.resize(n);
        line.resize(n);
        cycle.resize(n);
    }

    void dfs1(int a, int c) {
        if (vs[a]) return;
        vs[a] = 1;
        lineIndex[a] = c;
        line[c].push_back(a);

        for (int i = 0; i < n; i++) {
            if (p[a][i] == 1) dfs1(i, c);
        }
    }

    void dfs2(int a, int c) {
        if (vs[a]) return;
        vs[a] = 1;
        cycle[c].push_back(a);

        for (int i = 0; i < n; i++) {
            if (p[a][i] == 2) dfs2(i, c);
        }
    }

    int solve() {
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < n; j++) {
                if (p[i][j] == 3) return 0;
            }
        }

        for (int i = 0; i < n; i++) {
            if (!vs[i]) dfs1(i, i);
        }

        for (int i = 0; i < n; i++) {
            if (lineIndex[i] == i) vs[i] = 0;
        }

        for (int i = 0; i < n; i++) {
            if (!vs[i]) dfs2(i, i);
        }

        // construct res
        vector<vector<int>> res(n, vector<int>(n));

        for (int i = 0; i < n; i++) {
            for (int j = 0; j + 1 < line[i].size(); j++) {
                int x = line[i][j], y = line[i][j + 1];
                res[x][y] = res[y][x] = 1;
            }

            if (cycle[i].size() > 1) cycle[i].push_back(cycle[i][0]);
            for (int j = 0; j + 1 < cycle[i].size(); j++) {
                int x = cycle[i][j], y = cycle[i][j + 1];
                res[x][y] = res[y][x] = 1;
            }
        }

        build(res);
        // for (int i = 0; i < n; i++) {
        //     cout << lineIndex[i] << " ";
        // }
        // cout << endl;

        // for (int i = 0; i < n; i++) {
        //     if (cycle[i].size()) {
        //         for (auto j: cycle[i]) cout << j << " ";
        //         cout << endl;
        //     }
        // }

        return 1;
    }
};


int construct(vector<vector<int>> p) {
    return Solver(p).solve();
}

Compilation message

supertrees.cpp: In constructor 'Solver::Solver(std::vector<std::vector<int> >)':
supertrees.cpp:10:25: warning: 'Solver::p' will be initialized after [-Wreorder]
   10 |     vector<vector<int>> p, line, cycle;
      |                         ^
supertrees.cpp:7:9: warning:   'int Solver::n' [-Wreorder]
    7 |     int n;
      |         ^
supertrees.cpp:12:5: warning:   when initialized here [-Wreorder]
   12 |     Solver(vector<vector<int>> p): p(p), n(p.size()) {
      |     ^~~~~~
supertrees.cpp: In member function 'int Solver::solve()':
supertrees.cpp:63:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |             for (int j = 0; j + 1 < line[i].size(); j++) {
      |                             ~~~~~~^~~~~~~~~~~~~~~~
supertrees.cpp:69:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |             for (int j = 0; j + 1 < cycle[i].size(); j++) {
      |                             ~~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 11 ms 1536 KB Output is correct
7 Correct 259 ms 30076 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 11 ms 1536 KB Output is correct
7 Correct 259 ms 30076 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 11 ms 1536 KB Output is correct
13 Correct 244 ms 30200 KB Output is correct
14 Incorrect 0 ms 256 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Incorrect 1 ms 384 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 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 61 ms 7800 KB Output is correct
5 Correct 248 ms 30072 KB Output is correct
6 Correct 251 ms 30200 KB Output is correct
7 Correct 259 ms 30072 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 62 ms 7800 KB Output is correct
10 Correct 251 ms 30072 KB Output is correct
11 Correct 249 ms 30200 KB Output is correct
12 Correct 261 ms 30200 KB Output is correct
13 Correct 1 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 1 ms 256 KB Output is correct
16 Correct 63 ms 7928 KB Output is correct
17 Correct 251 ms 30072 KB Output is correct
18 Correct 253 ms 30072 KB Output is correct
19 Correct 245 ms 30044 KB Output is correct
20 Correct 246 ms 30072 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 11 ms 1536 KB Output is correct
7 Correct 259 ms 30076 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 11 ms 1536 KB Output is correct
13 Correct 244 ms 30200 KB Output is correct
14 Incorrect 0 ms 256 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 11 ms 1536 KB Output is correct
7 Correct 259 ms 30076 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 11 ms 1536 KB Output is correct
13 Correct 244 ms 30200 KB Output is correct
14 Incorrect 0 ms 256 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -