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Submission #1049871

# Submission time Handle Problem Language Result Execution time Memory
1049871 2024-08-09T05:51:13 Z aykhn Connecting Supertrees (IOI20_supertrees) C++17
56 / 100
 140 ms 24160 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;

struct DSU
{
	vector<int> e;
	void init(int n)
	{
		e.assign(n, -1);
	}
	int get(int x)
	{
		if (e[x] < 0) return x;
		return e[x] = get(e[x]);
	}
	int unite(int x, int y)
	{
		x = get(x), y = get(y);
		if (x == y) return 0;
		if (e[x] > e[y]) swap(x, y);
		e[x] += e[y];
		e[y] = x;
		return 1;
	}
};

int construct(std::vector<std::vector<int>> p) {
	int n = p.size();
	vector<vector<int>> ans(n, vector<int> (n, 0));
	DSU dsu;
	dsu.init(n);
	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < n; j++)
		{
			if (p[i][j] == 3) return 0;
			if (p[i][j] == 1 && dsu.unite(i, j)) ans[i][j] = ans[j][i] = 1;
		}
	}
	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < n; j++)
		{
			if (dsu.get(i) == dsu.get(j) && p[i][j] == 0) return 0;
		}
	}
	vector<int> comp[n];
	for (int i = 0; i < n; i++) comp[dsu.get(i)].push_back(i);
	DSU d1;
	d1.init(n);
	for (int i = 0; i < n; i++)
	{
		if (i != dsu.get(i)) continue;
		for (int &j : comp[i])
		{
			for (int k = 0; k < n; k++)
			{
				if ((p[j][k] == 2) != (p[i][k] == 2) && (!p[j][k]) != (!p[i][k])) return 0;
			}
		}
		for (int j = 0; j < n; j++)
		{
			if (p[i][j] == 2) d1.unite(i, dsu.get(j));
		}
	}
	vector<int> con[n];
	for (int i = 0; i < n; i++) con[d1.get(i)].push_back(i);
	for (int i = 0; i < n; i++)
	{
		if (con[i].size() <= 1) continue;
		if (con[i].size() == 2) return 0;
		int prev = con[i].back();
		for (int &j : con[i]) 
		{
			ans[prev][j] = ans[j][prev] = 1;
			prev = j;
		}
	}
	build(ans);
	return 1;
}

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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 100 ms 24160 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 100 ms 24160 KB Output is correct
8 Correct 0 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 4 ms 1372 KB Output is correct
13 Correct 102 ms 24148 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 4 ms 860 KB Output is correct
17 Correct 51 ms 12052 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 25 ms 5780 KB Output is correct
21 Correct 125 ms 22040 KB Output is correct
22 Correct 96 ms 22100 KB Output is correct
23 Correct 113 ms 22252 KB Output is correct
24 Correct 121 ms 22280 KB Output is correct
25 Correct 43 ms 12036 KB Output is correct
26 Correct 44 ms 12112 KB Output is correct
27 Correct 138 ms 22020 KB Output is correct
28 Correct 105 ms 22072 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 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 352 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 4 ms 1116 KB Output is correct
9 Correct 95 ms 22596 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 8 ms 1116 KB Output is correct
13 Correct 108 ms 22296 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 #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 32 ms 5772 KB Output is correct
5 Correct 100 ms 22352 KB Output is correct
6 Correct 132 ms 22248 KB Output is correct
7 Correct 110 ms 22416 KB Output is correct
8 Correct 0 ms 352 KB Output is correct
9 Correct 30 ms 5688 KB Output is correct
10 Correct 102 ms 22344 KB Output is correct
11 Correct 140 ms 22104 KB Output is correct
12 Correct 115 ms 22128 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 0 ms 352 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 24 ms 5780 KB Output is correct
17 Correct 98 ms 22096 KB Output is correct
18 Correct 136 ms 22228 KB Output is correct
19 Correct 104 ms 22040 KB Output is correct
20 Correct 100 ms 22164 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 100 ms 24160 KB Output is correct
8 Correct 0 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 4 ms 1372 KB Output is correct
13 Correct 102 ms 24148 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 4 ms 860 KB Output is correct
17 Correct 51 ms 12052 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 25 ms 5780 KB Output is correct
21 Correct 125 ms 22040 KB Output is correct
22 Correct 96 ms 22100 KB Output is correct
23 Correct 113 ms 22252 KB Output is correct
24 Correct 121 ms 22280 KB Output is correct
25 Correct 43 ms 12036 KB Output is correct
26 Correct 44 ms 12112 KB Output is correct
27 Correct 138 ms 22020 KB Output is correct
28 Correct 105 ms 22072 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 352 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 4 ms 1116 KB Output is correct
37 Correct 95 ms 22596 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 8 ms 1116 KB Output is correct
41 Correct 108 ms 22296 KB Output is correct
42 Incorrect 0 ms 348 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 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 5 ms 1372 KB Output is correct
7 Correct 100 ms 24160 KB Output is correct
8 Correct 0 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 4 ms 1372 KB Output is correct
13 Correct 102 ms 24148 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 4 ms 860 KB Output is correct
17 Correct 51 ms 12052 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 25 ms 5780 KB Output is correct
21 Correct 125 ms 22040 KB Output is correct
22 Correct 96 ms 22100 KB Output is correct
23 Correct 113 ms 22252 KB Output is correct
24 Correct 121 ms 22280 KB Output is correct
25 Correct 43 ms 12036 KB Output is correct
26 Correct 44 ms 12112 KB Output is correct
27 Correct 138 ms 22020 KB Output is correct
28 Correct 105 ms 22072 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 352 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 1 ms 348 KB Output is correct
36 Correct 4 ms 1116 KB Output is correct
37 Correct 95 ms 22596 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 8 ms 1116 KB Output is correct
41 Correct 108 ms 22296 KB Output is correct
42 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
43 Halted 0 ms 0 KB -