oj.uz

Submission #1002283

# Submission time Handle Problem Language Result Execution time Memory
1002283 2024-06-19T11:51:13 Z toast12 Connecting Supertrees (IOI20_supertrees) C++14
21 / 100
 118 ms 24196 KB 
#include "supertrees.h"
#include <vector>
#include <map>
#include <iostream>
using namespace std;

struct DSU {
	int n;
	vector<int> link, size;
	DSU(int sz) {
		n = sz;
		link.resize(sz);
		size.resize(sz);
		for (int i = 0; i < n; i++) {
			link[i] = i;
			size[i] = 1;
		}
	}
	int find(int x) {
		while (x != link[x])
			x = link[x];
		return x;
	} 
	bool same(int a, int b) {
		return find(a) == find(b);
	}
	void unite(int a, int b) {
		a = find(a);
		b = find(b);
		if (a == b)
			return;
		if (size[a] < size[b])
			swap(a, b);
		link[b] = a;
		size[a] += size[b];
	}
};

int construct(std::vector<vector<int>> p) {
	int n = p.size();
	vector<vector<int>> answer(n, vector<int>(n));
	vector<vector<int>> components(n);
	DSU d(n+1);
	for (int i = 0; i < n; i++) {
		components[i].push_back(i);
		for (int j = 0; j < n; j++) {
			if (i == j)
				continue;
			if (p[i][j]) {
				if (!d.same(i, j)) {
					d.unite(i, j);
					components[d.find(i)].push_back(j);
				}
			}
		}
	}
	// for (int i = 0; i < n; i++) {
	// 	cout << i << ' ';
	// 	for (auto x : components[i])
	// 		cout << x << ' ';
	// 	cout << '\n';
	// }
	for (int i = 0; i < n; i++) {
		if (components[i].size() == 1)
			continue;
		for (int j = 0; j < (int)components[i].size(); j++) {
			for (int k = j+1; k < (int)components[i].size(); k++) {
				if (!p[components[i][j]][components[i][k]])
					return 0;
			}
		}
		for (int j = 0; j < (int)components[i].size()-1; j++) {
			answer[components[i][j]][components[i][j+1]] = 1;
			answer[components[i][j+1]][components[i][j]] = 1;
		}
	}
	build(answer);
	return 1;
}

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 1 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 8 ms 1372 KB Output is correct
7 Correct 113 ms 24188 KB Output is correct

Subtask #2
10.0 / 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 1 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 8 ms 1372 KB Output is correct
7 Correct 113 ms 24188 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 432 KB Output is correct
12 Correct 6 ms 1220 KB Output is correct
13 Correct 112 ms 24064 KB Output is correct
14 Correct 0 ms 440 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 1116 KB Output is correct
17 Correct 86 ms 14196 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 28 ms 6236 KB Output is correct
21 Correct 118 ms 23984 KB Output is correct
22 Correct 111 ms 24144 KB Output is correct
23 Correct 117 ms 24148 KB Output is correct
24 Correct 109 ms 24196 KB Output is correct
25 Correct 51 ms 14164 KB Output is correct
26 Correct 70 ms 14076 KB Output is correct
27 Correct 117 ms 24008 KB Output is correct
28 Correct 111 ms 23984 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 Incorrect 0 ms 428 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 Incorrect 0 ms 348 KB Too few ways to get from 0 to 1, should be 2 found 1
3 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 1 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 8 ms 1372 KB Output is correct
7 Correct 113 ms 24188 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 432 KB Output is correct
12 Correct 6 ms 1220 KB Output is correct
13 Correct 112 ms 24064 KB Output is correct
14 Correct 0 ms 440 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 1116 KB Output is correct
17 Correct 86 ms 14196 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 28 ms 6236 KB Output is correct
21 Correct 118 ms 23984 KB Output is correct
22 Correct 111 ms 24144 KB Output is correct
23 Correct 117 ms 24148 KB Output is correct
24 Correct 109 ms 24196 KB Output is correct
25 Correct 51 ms 14164 KB Output is correct
26 Correct 70 ms 14076 KB Output is correct
27 Correct 117 ms 24008 KB Output is correct
28 Correct 111 ms 23984 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 Incorrect 0 ms 428 KB Answer gives possible 1 while actual possible 0
33 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 1 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 8 ms 1372 KB Output is correct
7 Correct 113 ms 24188 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 432 KB Output is correct
12 Correct 6 ms 1220 KB Output is correct
13 Correct 112 ms 24064 KB Output is correct
14 Correct 0 ms 440 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 3 ms 1116 KB Output is correct
17 Correct 86 ms 14196 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 28 ms 6236 KB Output is correct
21 Correct 118 ms 23984 KB Output is correct
22 Correct 111 ms 24144 KB Output is correct
23 Correct 117 ms 24148 KB Output is correct
24 Correct 109 ms 24196 KB Output is correct
25 Correct 51 ms 14164 KB Output is correct
26 Correct 70 ms 14076 KB Output is correct
27 Correct 117 ms 24008 KB Output is correct
28 Correct 111 ms 23984 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 Incorrect 0 ms 428 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -