Submission #1005207

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
1005207	2024-06-22T08:52:01 Z	thinknoexit	Connecting Supertrees (IOI20_supertrees)	C++17	56 / 100	113 ms	24224 KB

supertrees

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int N = 1010;
int p[N], p2[N];
int fr(int i) {
	return p[i] == i ? i : p[i] = fr(p[i]);
}
int fr2(int i) {
	return p2[i] == i ? i : p2[i] = fr2(p2[i]);
}
int construct(vector<vector<int>> B) {
	int n = B.size();
	vector<vector<int>> ans(n, vector<int>(n, 0));
	// Calculate for p[i][j] = 1
	iota(p, p + n, 0);
	for (int i = 0;i < n;i++) {
		for (int j = i + 1;j < n;j++) {
			if (B[i][j] == 1) {
				p[fr(i)] = fr(j);
			}
		}
	}
	vector<vector<int>> g(n);
	for (int i = 0;i < n;i++) {
		g[fr(i)].push_back(i);
	}
	vector<int> node;
	for (int G = 0;G < n;G++) {
		if (g[G].empty()) continue;
		node.push_back(G);
		auto& v = g[G];
		int m = v.size();
		int cnt = 0;
		for (int i = 0;i < m;i++) {
			for (int j = i + 1;j < m;j++) {
				if (B[v[i]][v[j]] != 1) return 0;
			}
		}
		for (int i = 1;i < m;i++) {
			ans[v[0]][v[i]] = ans[v[i]][v[0]] = 1;
		}
	}
	iota(p2, p2 + n, 0);
	int k = node.size();
	for (int i = 0;i < k;i++) {
		for (int j = i + 1;j < k;j++) {
			if (B[node[i]][node[j]] == 2) {
				p2[fr2(node[i])] = fr2(node[j]);
			}
		}
	}
	vector<vector<int>> g2(n);
	for (int i = 0;i < k;i++) {
		g2[fr2(node[i])].push_back(node[i]);
	}
	for (int G = 0;G < n;G++) {
		if (g2[G].empty() || (int)g2[G].size() == 1) continue;
		//if ((int)g2[G].size() == 2) return 0;

		auto& v = g2[G];
		int m = v.size();
		int cnt = 0;
		for (int i = 0;i < m;i++) {
			for (int j = i + 1;j < m;j++) {
				if (B[v[i]][v[j]] != 2) return 0;
			}
		}
		for (int i = 0;i < m;i++) {
			ans[v[(i + 1) % m]][v[i]] = ans[v[i]][v[(i + 1) % m]] = 1;
		}
	}
	build(ans);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:35:7: warning: unused variable 'cnt' [-Wunused-variable]
   35 |   int cnt = 0;
      |       ^~~
supertrees.cpp:64:7: warning: unused variable 'cnt' [-Wunused-variable]
   64 |   int cnt = 0;
      |       ^~~

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	4 ms	1284 KB	Output is correct
7	Correct	91 ms	22028 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	4 ms	1284 KB	Output is correct
7	Correct	91 ms	22028 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	4 ms	1116 KB	Output is correct
13	Correct	110 ms	22296 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	2 ms	860 KB	Output is correct
17	Correct	56 ms	12060 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	5752 KB	Output is correct
21	Correct	104 ms	22192 KB	Output is correct
22	Correct	112 ms	22100 KB	Output is correct
23	Correct	113 ms	22100 KB	Output is correct
24	Correct	99 ms	22104 KB	Output is correct
25	Correct	47 ms	12112 KB	Output is correct
26	Correct	41 ms	12112 KB	Output is correct
27	Correct	102 ms	22028 KB	Output is correct
28	Correct	103 ms	22100 KB	Output is correct

Subtask #3
0 / 19.0

#	Verdict	Memory	Grader output
1	Correct	348 KB	Output is correct
2	Correct	348 KB	Output is correct
3	Correct	348 KB	Output is correct
4	Incorrect	348 KB	Answer gives possible 1 while actual possible 0
5	Halted	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	25 ms	5720 KB	Output is correct
5	Correct	97 ms	22180 KB	Output is correct
6	Correct	100 ms	22100 KB	Output is correct
7	Correct	113 ms	22096 KB	Output is correct
8	Correct	0 ms	348 KB	Output is correct
9	Correct	27 ms	5844 KB	Output is correct
10	Correct	112 ms	22284 KB	Output is correct
11	Correct	106 ms	22096 KB	Output is correct
12	Correct	108 ms	22284 KB	Output is correct
13	Correct	0 ms	344 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	26 ms	6232 KB	Output is correct
17	Correct	104 ms	24076 KB	Output is correct
18	Correct	109 ms	24224 KB	Output is correct
19	Correct	99 ms	24144 KB	Output is correct
20	Correct	106 ms	24064 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	4 ms	1284 KB	Output is correct
7	Correct	91 ms	22028 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	4 ms	1116 KB	Output is correct
13	Correct	110 ms	22296 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	2 ms	860 KB	Output is correct
17	Correct	56 ms	12060 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	5752 KB	Output is correct
21	Correct	104 ms	22192 KB	Output is correct
22	Correct	112 ms	22100 KB	Output is correct
23	Correct	113 ms	22100 KB	Output is correct
24	Correct	99 ms	22104 KB	Output is correct
25	Correct	47 ms	12112 KB	Output is correct
26	Correct	41 ms	12112 KB	Output is correct
27	Correct	102 ms	22028 KB	Output is correct
28	Correct	103 ms	22100 KB	Output is correct
29	Correct	0 ms	348 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	348 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	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	4 ms	1284 KB	Output is correct
7	Correct	91 ms	22028 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	0 ms	348 KB	Output is correct
12	Correct	4 ms	1116 KB	Output is correct
13	Correct	110 ms	22296 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	348 KB	Output is correct
16	Correct	2 ms	860 KB	Output is correct
17	Correct	56 ms	12060 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	5752 KB	Output is correct
21	Correct	104 ms	22192 KB	Output is correct
22	Correct	112 ms	22100 KB	Output is correct
23	Correct	113 ms	22100 KB	Output is correct
24	Correct	99 ms	22104 KB	Output is correct
25	Correct	47 ms	12112 KB	Output is correct
26	Correct	41 ms	12112 KB	Output is correct
27	Correct	102 ms	22028 KB	Output is correct
28	Correct	103 ms	22100 KB	Output is correct
29	Correct	0 ms	348 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	348 KB	Answer gives possible 1 while actual possible 0
33	Halted	0 ms	0 KB	-

Submission #1005207

Compilation message

Subtask #1 11.0 / 11.0

Subtask #2 10.0 / 10.0

Subtask #3 0 / 19.0

Subtask #4 35.0 / 35.0

Subtask #5 0 / 21.0

Subtask #6 0 / 4.0

Subtask #1
11.0 / 11.0

Subtask #2
10.0 / 10.0

Subtask #3
0 / 19.0

Subtask #4
35.0 / 35.0

Subtask #5
0 / 21.0

Subtask #6
0 / 4.0