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Submission #1087739

# Submission time Handle Problem Language Result Execution time Memory
1087739 2024-09-13T07:35:58 Z T0p_ Connecting Supertrees (IOI20_supertrees) C++14
56 / 100
 135 ms 24184 KB 
#include "supertrees.h"
#include <bits/stdc++.h>

using namespace std;

const int N = 1000;

bool is_add[N];
int tree_parent[N], circular_parent[N];

int find_tree_parent(int u) {
	return tree_parent[u] = (u == tree_parent[u])
		? u
		: find_tree_parent(tree_parent[u]); 
}

int find_circular_parent(int u) {
	return circular_parent[u] = (u == circular_parent[u])
		? u
		: find_circular_parent(circular_parent[u]); 
}

int construct(vector<vector<int>> p) {
	int n = p.size();
	vector<vector<int>> ans(n, vector<int>(n));

	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++) {
		tree_parent[i] = i;
		circular_parent[i] = i;
	}

	for (int i=0 ; i<n ; i++) {
		for (int j=i+1 ; j<n ; j++) {
			if (p[i][j] == 1) {
				int ii = find_tree_parent(i);
				int jj = find_tree_parent(j);

				if (ii != jj) {
					tree_parent[ii] = jj;
					ans[i][j] = ans[j][i] = 1;
				}
			}
		}
	}

	for (int i=0 ; i<n ; i++) {
		for (int j=i+1 ; j<n ; j++) {
			int ii = find_tree_parent(i);
			int jj = find_tree_parent(j);

			if (p[i][j] != 1 && ii == jj) {
				return 0;
			}
		}
	}

	for (int i=0 ; i<n ; i++) {
		for (int j=i+1 ; j<n ; j++) {
			if (p[i][j] == 2) {
				int ii = find_circular_parent(find_tree_parent(i));
				int jj = find_circular_parent(find_tree_parent(j));

				circular_parent[ii] = jj;
			}
		}
	}

	vector<int> group[N];
	for (int i=0 ; i<n ; i++) {
		int tree_i = find_tree_parent(i);

		if (is_add[tree_i]) continue;
		is_add[tree_i] = true;

		int circular_i = find_circular_parent(tree_i);
		group[circular_i].push_back(tree_i);
	}

	for (int i=0 ; i<N ; i++) {

		int sz = group[i].size();

		if (sz <= 1) {
			continue;
		}
		else if (sz == 2) {
			return 0;
		}
		else {
			for (int j=0 ; j<sz-1 ; j++) {
				ans[group[i][j]][group[i][j+1]] = ans[group[i][j+1]][group[i][j]] = 1;
			}
			ans[group[i][0]][group[i][sz-1]] = ans[group[i][sz-1]][group[i][0]] = 1;
		}
	}
	
	build(ans);
	return 1;
}

Subtask #1
11.0 / 11.0

# 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 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 6 ms 1216 KB Output is correct
7 Correct 123 ms 24148 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 6 ms 1216 KB Output is correct
7 Correct 123 ms 24148 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 10 ms 1372 KB Output is correct
13 Correct 120 ms 24144 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 968 KB Output is correct
17 Correct 68 ms 14160 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 31 ms 6280 KB Output is correct
21 Correct 118 ms 24148 KB Output is correct
22 Correct 120 ms 24076 KB Output is correct
23 Correct 135 ms 24148 KB Output is correct
24 Correct 112 ms 23948 KB Output is correct
25 Correct 51 ms 14160 KB Output is correct
26 Correct 56 ms 14016 KB Output is correct
27 Correct 131 ms 24060 KB Output is correct
28 Correct 112 ms 24184 KB Output is correct

Subtask #3
0 / 19.0

# 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 1 ms 344 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 6 ms 1372 KB Output is correct
9 Correct 133 ms 24096 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 5 ms 1192 KB Output is correct
13 Correct 117 ms 24180 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 28 ms 6340 KB Output is correct
5 Correct 121 ms 24096 KB Output is correct
6 Correct 134 ms 24052 KB Output is correct
7 Correct 123 ms 24080 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 29 ms 6308 KB Output is correct
10 Correct 117 ms 24144 KB Output is correct
11 Correct 118 ms 24144 KB Output is correct
12 Correct 120 ms 24148 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 31 ms 6232 KB Output is correct
17 Correct 114 ms 24100 KB Output is correct
18 Correct 118 ms 24144 KB Output is correct
19 Correct 119 ms 24144 KB Output is correct
20 Correct 116 ms 23988 KB Output is correct

Subtask #5
0 / 21.0

# 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 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 6 ms 1216 KB Output is correct
7 Correct 123 ms 24148 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 10 ms 1372 KB Output is correct
13 Correct 120 ms 24144 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 968 KB Output is correct
17 Correct 68 ms 14160 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 31 ms 6280 KB Output is correct
21 Correct 118 ms 24148 KB Output is correct
22 Correct 120 ms 24076 KB Output is correct
23 Correct 135 ms 24148 KB Output is correct
24 Correct 112 ms 23948 KB Output is correct
25 Correct 51 ms 14160 KB Output is correct
26 Correct 56 ms 14016 KB Output is correct
27 Correct 131 ms 24060 KB Output is correct
28 Correct 112 ms 24184 KB Output is correct
29 Correct 0 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 344 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 6 ms 1372 KB Output is correct
37 Correct 133 ms 24096 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 5 ms 1192 KB Output is correct
41 Correct 117 ms 24180 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 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 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 6 ms 1216 KB Output is correct
7 Correct 123 ms 24148 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 600 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 10 ms 1372 KB Output is correct
13 Correct 120 ms 24144 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 968 KB Output is correct
17 Correct 68 ms 14160 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 31 ms 6280 KB Output is correct
21 Correct 118 ms 24148 KB Output is correct
22 Correct 120 ms 24076 KB Output is correct
23 Correct 135 ms 24148 KB Output is correct
24 Correct 112 ms 23948 KB Output is correct
25 Correct 51 ms 14160 KB Output is correct
26 Correct 56 ms 14016 KB Output is correct
27 Correct 131 ms 24060 KB Output is correct
28 Correct 112 ms 24184 KB Output is correct
29 Correct 0 ms 344 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 1 ms 344 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 6 ms 1372 KB Output is correct
37 Correct 133 ms 24096 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 5 ms 1192 KB Output is correct
41 Correct 117 ms 24180 KB Output is correct
42 Incorrect 0 ms 348 KB Answer gives possible 1 while actual possible 0
43 Halted 0 ms 0 KB -