oj.uz

Submission #927636

# Submission time Handle Problem Language Result Execution time Memory
927636 2024-02-15T07:47:48 Z haxorman Connecting Supertrees (IOI20_supertrees) C++14
11 / 100
 169 ms 22352 KB 
#include <bits/stdc++.h>
#include "supertrees.h"
using namespace std;

const int mxN = 1007;

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

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

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

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

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

    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].push_back(i);
    }

    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++j) {
            if (p[i][j] == 2) {
                int x = find(i), y = find(j);
                if (x != y) {
                    bool ok = true;
                    for (auto u : cmp[x]) {
                        for (auto v : cmp[y]) {
                            ok &= (p[u][v] == 2);
                        }
                    }

                    if (ok) {
                        unite(x, y);
                        for (auto c : cmp[y]) {
                            cmp[x].push_back(c);
                        }
                    }
                }
            } 
        }
    }

    for (int i = 0; i < n; ++i) {
        int x = find(i);
        if (done[x] || cmp[x].size() <= 2) {
            continue;
        }
        done[x] = true;
    
        /*
        cout << x << "\n";
        for (auto c : cmp[x]) {
            cout << c << ' ';
        }
        cout << "\n";
        */

        for (int j = 0; j < cmp[x].size() - 1; ++j) {
            mark[cmp[x][j]] = true;
            ans[cmp[x][j]][cmp[x][j+1]] = ans[cmp[x][j+1]][cmp[x][j]] = 1;
        }
        mark[cmp[x].back()] = true;
        ans[cmp[x][0]][cmp[x].back()] = ans[cmp[x].back()][cmp[x][0]] = 1;
    }
    
    memset(dsu, -1, sizeof(dsu));
    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            if (i != j && p[i][j] == 1) {
                //assert(!(mark[i] && mark[j]));

                if (unite(i, j)) {
                    ans[i][j] = ans[j][i] = 1;
                }
            }
        }
    }

    build(ans);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:78:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   78 |         for (int j = 0; j < cmp[x].size() - 1; ++j) {
      |                         ~~^~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 1368 KB Output is correct
7 Correct 160 ms 22076 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 1368 KB Output is correct
7 Correct 160 ms 22076 KB Output is correct
8 Correct 1 ms 344 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 6 ms 1368 KB Output is correct
13 Correct 156 ms 22068 KB Output is correct
14 Incorrect 1 ms 348 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 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 38 ms 5828 KB Output is correct
5 Correct 154 ms 22020 KB Output is correct
6 Correct 169 ms 22352 KB Output is correct
7 Correct 158 ms 22100 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 38 ms 5700 KB Output is correct
10 Correct 154 ms 22096 KB Output is correct
11 Correct 153 ms 22108 KB Output is correct
12 Correct 153 ms 22100 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 Incorrect 37 ms 5876 KB Too many ways to get from 0 to 486, should be 2 found no less than 3
17 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 1368 KB Output is correct
7 Correct 160 ms 22076 KB Output is correct
8 Correct 1 ms 344 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 6 ms 1368 KB Output is correct
13 Correct 156 ms 22068 KB Output is correct
14 Incorrect 1 ms 348 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 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 6 ms 1368 KB Output is correct
7 Correct 160 ms 22076 KB Output is correct
8 Correct 1 ms 344 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 6 ms 1368 KB Output is correct
13 Correct 156 ms 22068 KB Output is correct
14 Incorrect 1 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -