oj.uz

Submission #829701

# Submission time Handle Problem Language Result Execution time Memory
829701 2023-08-18T14:14:07 Z faruk Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 190 ms 26828 KB 
#include "supertrees.h"
#include <iostream>
#include <vector>
#include <algorithm>
#define mp make_pair
#define all(a) a.begin(), a.end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

vector<vector<int> > out;

int n;
bool check_components(vector<vector<int> > p) {
	vector<int> comp(n, -1);
	for (int i = 0; i < n; i++) {
		if (p[i][i] != 1)
			return false;
		if (comp[i] == -1) {
			for (int j = 0; j < n; j++) {
				if (p[i][j] != 0 and comp[j] != -1)
					return false;
				if (p[i][j] != 0)
					comp[j] = i;
			}
		}
		else {
			for (int j = 0; j < n; j++)
				if (p[i][j] != 0 and comp[j] != comp[i])
					return false;
		}
	}
	return true;
}

void make_line(vector<int> a) {
	if (a.size() == 1)
		return;
	for (int i = 0; i < a.size() - 1; i++)
	{
		int f = a[i], s = a[i + 1];
		out[f][s] = 1, out[s][f] = 1;
	}
}
vector<vector<int> > p;
vector<bool> vis;
vector<int> ch;
void dfs(int c) {
	ch.push_back(c);
	vis[c] = true;
	for (int i = 0; i < n; i++) {
		if (p[i][c] == 1 and !vis[i])
			dfs(i);
	} 
}

int construct(std::vector<std::vector<int>> p) {
	n = p.size();
	::p = p;
	std::vector<std::vector<int>> answer;
	if (check_components(p) == false)
		return 0;
	vector<bool> visited(n);
	out = vector<vector<int> >(n, vector<int>(n, 0));
	for (int v = 0; v < n; v++) {
		if (visited[v])
			continue;
		vector<int> mine;
		for (int j = 0; j < n; j++)
			if (p[v][j] != 0)
				mine.push_back(j), visited[j] = true;
		if (mine.size() == 1)
			continue;

		vector<int> everyone_else = mine;
		vector<vector<int> > chains;
		vis = vector<bool>(n);
		for (int a : everyone_else) {
			// now we decompose into sub-chains
			ch.clear();
			if (!vis[a]) {
				dfs(a);
				chains.push_back(ch);
			}
		}

		// now check if chains are good
		for (int i = 0; i < chains.size(); i++) {
			for (int a : chains[i])
				for (int b : chains[i])
					if (p[a][b] != 1)
						return 0;
			for (int j = i + 1; j < chains.size(); j++) {
				for (int a : chains[i])
					for (int b : chains[j])
						if (p[a][b] != 2)
							return 0;
			}
		}

		for (vector<int> chai : chains)
			make_line(chai);
		// connecting chains and cyc
		if (chains.size() > 1) {
			vector<int> fin;
			for (int i = 0; i < chains.size(); i++)
				fin.push_back(chains[i][0]); 
			fin.push_back(chains[0][0]);
			if (chains.size() == 2)
				return 0;
			make_line(fin);
		}
	}
	build(out);
	return 1;
}

Compilation message

supertrees.cpp: In function 'void make_line(std::vector<int>)':
supertrees.cpp:41:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |  for (int i = 0; i < a.size() - 1; i++)
      |                  ~~^~~~~~~~~~~~~~
supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:90:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |   for (int i = 0; i < chains.size(); i++) {
      |                   ~~^~~~~~~~~~~~~~~
supertrees.cpp:95:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |    for (int j = i + 1; j < chains.size(); j++) {
      |                        ~~^~~~~~~~~~~~~~~
supertrees.cpp:108:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |    for (int i = 0; i < chains.size(); i++)
      |                    ~~^~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1364 KB Output is correct
7 Correct 155 ms 26020 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1364 KB Output is correct
7 Correct 155 ms 26020 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 6 ms 1236 KB Output is correct
13 Correct 170 ms 26040 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 65 ms 16012 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 42 ms 7128 KB Output is correct
21 Correct 163 ms 26828 KB Output is correct
22 Correct 155 ms 26772 KB Output is correct
23 Correct 161 ms 26708 KB Output is correct
24 Correct 166 ms 26764 KB Output is correct
25 Correct 63 ms 16732 KB Output is correct
26 Correct 64 ms 16832 KB Output is correct
27 Correct 163 ms 26716 KB Output is correct
28 Correct 161 ms 26652 KB Output is correct

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 244 KB Output is correct
8 Correct 7 ms 1236 KB Output is correct
9 Correct 155 ms 25964 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 7 ms 1364 KB Output is correct
13 Correct 158 ms 26008 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 65 ms 16004 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 0 ms 212 KB Output is correct
21 Correct 58 ms 6712 KB Output is correct
22 Correct 167 ms 26032 KB Output is correct
23 Correct 162 ms 25880 KB Output is correct
24 Correct 186 ms 26020 KB Output is correct
25 Correct 79 ms 16004 KB Output is correct
26 Correct 62 ms 16000 KB Output is correct
27 Correct 156 ms 25888 KB Output is correct
28 Correct 170 ms 25956 KB Output is correct
29 Correct 66 ms 16076 KB Output is correct

Subtask #4
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 39 ms 6716 KB Output is correct
5 Correct 170 ms 26008 KB Output is correct
6 Correct 155 ms 25880 KB Output is correct
7 Correct 162 ms 26008 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 42 ms 6672 KB Output is correct
10 Correct 160 ms 26000 KB Output is correct
11 Correct 155 ms 25924 KB Output is correct
12 Correct 190 ms 26000 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 39 ms 6676 KB Output is correct
17 Correct 169 ms 26012 KB Output is correct
18 Correct 165 ms 26000 KB Output is correct
19 Correct 156 ms 25944 KB Output is correct
20 Correct 167 ms 25996 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1364 KB Output is correct
7 Correct 155 ms 26020 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 6 ms 1236 KB Output is correct
13 Correct 170 ms 26040 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 65 ms 16012 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 42 ms 7128 KB Output is correct
21 Correct 163 ms 26828 KB Output is correct
22 Correct 155 ms 26772 KB Output is correct
23 Correct 161 ms 26708 KB Output is correct
24 Correct 166 ms 26764 KB Output is correct
25 Correct 63 ms 16732 KB Output is correct
26 Correct 64 ms 16832 KB Output is correct
27 Correct 163 ms 26716 KB Output is correct
28 Correct 161 ms 26652 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 244 KB Output is correct
36 Correct 7 ms 1236 KB Output is correct
37 Correct 155 ms 25964 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 7 ms 1364 KB Output is correct
41 Correct 158 ms 26008 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 3 ms 852 KB Output is correct
45 Correct 65 ms 16004 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 0 ms 212 KB Output is correct
49 Correct 58 ms 6712 KB Output is correct
50 Correct 167 ms 26032 KB Output is correct
51 Correct 162 ms 25880 KB Output is correct
52 Correct 186 ms 26020 KB Output is correct
53 Correct 79 ms 16004 KB Output is correct
54 Correct 62 ms 16000 KB Output is correct
55 Correct 156 ms 25888 KB Output is correct
56 Correct 170 ms 25956 KB Output is correct
57 Correct 66 ms 16076 KB Output is correct
58 Correct 0 ms 212 KB Output is correct
59 Correct 1 ms 212 KB Output is correct
60 Correct 3 ms 948 KB Output is correct
61 Correct 66 ms 17964 KB Output is correct
62 Correct 0 ms 212 KB Output is correct
63 Correct 0 ms 212 KB Output is correct
64 Correct 0 ms 212 KB Output is correct
65 Correct 40 ms 7148 KB Output is correct
66 Correct 63 ms 18040 KB Output is correct
67 Correct 65 ms 18036 KB Output is correct
68 Correct 65 ms 17924 KB Output is correct
69 Correct 63 ms 18040 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1364 KB Output is correct
7 Correct 155 ms 26020 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 6 ms 1236 KB Output is correct
13 Correct 170 ms 26040 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 3 ms 852 KB Output is correct
17 Correct 65 ms 16012 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 42 ms 7128 KB Output is correct
21 Correct 163 ms 26828 KB Output is correct
22 Correct 155 ms 26772 KB Output is correct
23 Correct 161 ms 26708 KB Output is correct
24 Correct 166 ms 26764 KB Output is correct
25 Correct 63 ms 16732 KB Output is correct
26 Correct 64 ms 16832 KB Output is correct
27 Correct 163 ms 26716 KB Output is correct
28 Correct 161 ms 26652 KB Output is correct
29 Correct 1 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 244 KB Output is correct
36 Correct 7 ms 1236 KB Output is correct
37 Correct 155 ms 25964 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 7 ms 1364 KB Output is correct
41 Correct 158 ms 26008 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 3 ms 852 KB Output is correct
45 Correct 65 ms 16004 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 0 ms 212 KB Output is correct
49 Correct 58 ms 6712 KB Output is correct
50 Correct 167 ms 26032 KB Output is correct
51 Correct 162 ms 25880 KB Output is correct
52 Correct 186 ms 26020 KB Output is correct
53 Correct 79 ms 16004 KB Output is correct
54 Correct 62 ms 16000 KB Output is correct
55 Correct 156 ms 25888 KB Output is correct
56 Correct 170 ms 25956 KB Output is correct
57 Correct 66 ms 16076 KB Output is correct
58 Correct 0 ms 212 KB Output is correct
59 Correct 0 ms 212 KB Output is correct
60 Correct 0 ms 212 KB Output is correct
61 Correct 39 ms 6716 KB Output is correct
62 Correct 170 ms 26008 KB Output is correct
63 Correct 155 ms 25880 KB Output is correct
64 Correct 162 ms 26008 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 42 ms 6672 KB Output is correct
67 Correct 160 ms 26000 KB Output is correct
68 Correct 155 ms 25924 KB Output is correct
69 Correct 190 ms 26000 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 0 ms 212 KB Output is correct
72 Correct 0 ms 212 KB Output is correct
73 Correct 39 ms 6676 KB Output is correct
74 Correct 169 ms 26012 KB Output is correct
75 Correct 165 ms 26000 KB Output is correct
76 Correct 156 ms 25944 KB Output is correct
77 Correct 167 ms 25996 KB Output is correct
78 Correct 0 ms 212 KB Output is correct
79 Correct 1 ms 212 KB Output is correct
80 Correct 3 ms 948 KB Output is correct
81 Correct 66 ms 17964 KB Output is correct
82 Correct 0 ms 212 KB Output is correct
83 Correct 0 ms 212 KB Output is correct
84 Correct 0 ms 212 KB Output is correct
85 Correct 40 ms 7148 KB Output is correct
86 Correct 63 ms 18040 KB Output is correct
87 Correct 65 ms 18036 KB Output is correct
88 Correct 65 ms 17924 KB Output is correct
89 Correct 63 ms 18040 KB Output is correct
90 Correct 0 ms 212 KB Output is correct
91 Correct 0 ms 296 KB Output is correct
92 Correct 3 ms 980 KB Output is correct
93 Correct 65 ms 18040 KB Output is correct
94 Correct 1 ms 212 KB Output is correct
95 Correct 0 ms 212 KB Output is correct
96 Correct 0 ms 212 KB Output is correct
97 Correct 17 ms 4716 KB Output is correct
98 Correct 64 ms 18040 KB Output is correct
99 Correct 62 ms 18040 KB Output is correct
100 Correct 72 ms 17924 KB Output is correct
101 Correct 65 ms 18064 KB Output is correct
102 Correct 69 ms 18016 KB Output is correct
103 Correct 80 ms 18072 KB Output is correct
104 Correct 72 ms 18072 KB Output is correct
105 Correct 66 ms 18040 KB Output is correct