oj.uz

Submission #927632

# Submission time Handle Problem Language Result Execution time Memory
927632 2024-02-15T07:44:44 Z haxorman Connecting Supertrees (IOI20_supertrees) C++14
11 / 100
 175 ms 22360 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;
    for (auto c : cmp[y]) {
        cmp[x].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].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 (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;
    }
    
    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            if (i != j && p[i][j] == 1) {
                int x = i, y = j;
                assert(!(mark[i] && mark[j]));

                if (!mark[x]) {
                    x = find(x);
                }
                if (!mark[y]) {
                    y = find(y);
                }

                if (x != y) {
                    ans[x][y] = ans[y][x] = 1;
                }
                unite(x, y);
            }
        }
    }

    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 0 ms 344 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 7 ms 1116 KB Output is correct
7 Correct 161 ms 22208 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 7 ms 1116 KB Output is correct
7 Correct 161 ms 22208 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 6 ms 1136 KB Output is correct
13 Correct 161 ms 22000 KB Output is correct
14 Incorrect 0 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 1 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 344 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 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 43 ms 5716 KB Output is correct
5 Correct 175 ms 22360 KB Output is correct
6 Correct 152 ms 22216 KB Output is correct
7 Correct 158 ms 22260 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 39 ms 5776 KB Output is correct
10 Correct 154 ms 22096 KB Output is correct
11 Correct 174 ms 22056 KB Output is correct
12 Correct 158 ms 22032 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Runtime error 20 ms 6580 KB Execution killed with signal 6
17 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 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 7 ms 1116 KB Output is correct
7 Correct 161 ms 22208 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 6 ms 1136 KB Output is correct
13 Correct 161 ms 22000 KB Output is correct
14 Incorrect 0 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 0 ms 344 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 7 ms 1116 KB Output is correct
7 Correct 161 ms 22208 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 6 ms 1136 KB Output is correct
13 Correct 161 ms 22000 KB Output is correct
14 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
15 Halted 0 ms 0 KB -