oj.uz

Submission #771886

# Submission time Handle Problem Language Result Execution time Memory
771886 2023-07-03T11:16:40 Z Blagoj Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 179 ms 27164 KB 
#include <bits/stdc++.h>
#include "supertrees.h"

using namespace std;

int leader[1005], ranking[1005];

int Find(int n) {
	if (leader[n] != n) leader[n] = Find(leader[n]);
	return leader[n];
}

void Union(int x, int y) {
	x = Find(x), y = Find(y);
	if (ranking[x] > ranking[y]) swap(x, y);
	ranking[y] += ranking[x];
	leader[x] = y;
}

vector<int> g[1005];
bool visited[1005];
vector<int> components;

void dfs(int n) {
	visited[n] = 1;
	components.push_back(n);
	for (auto x : g[n]) {
		if (visited[x]) continue;
		dfs(x);
	}
}

int construct(vector<vector<int>> p) {
	int n = p.size();
	for (int i = 0; i <= n; i++) {
		leader[i] = i;
		ranking[i] = 1;
	}
	vector<vector<int>> answer(n, vector<int>(n));
	for (int i = 0; i < n; i++) {
		for (int j = i + 1; j < n; j++) {
			if (p[i][j] == 3) return 0;
			if (p[i][j] == 1) Union(i, j);
		}
	}
	for (int i = 0; i < n; i++) if (Find(i) != i) answer[Find(i)][i] = answer[i][Find(i)] = 1;
	for (int i = 0; i < n; i++) { 
		for (int j = i + 1; j < n; j++) {
			if (p[i][j] == 0 && Find(i) == Find(j)) return 0;
			if (p[i][j] == 2 && Find(i) == i && Find(j) == j) {
				g[i].push_back(j);
				g[j].push_back(i);
			}
		}
	}
	for (int i = 0; i < n; i++) {
		if (Find(i) != i || visited[i]) continue;
		dfs(i);
		if (components.size() == 2) return 0;
		for (auto x : components) {
			for (auto y : components) if (x != y && p[x][y] != 2) return 0;
		}
		for (int j = 0; j < components.size() - 1; j++) {
			answer[components[j]][components[j + 1]] = answer[components[j + 1]][components[j]] = 1;
		}
		if (components.size() != 1) answer[components[0]][components[components.size() - 1]] = answer[components[components.size() - 1]][components[0]] = 1;
		components.clear();
	}
	build(answer);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:63:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |   for (int j = 0; j < components.size() - 1; j++) {
      |                   ~~^~~~~~~~~~~~~~~~~~~~~~~

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 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1108 KB Output is correct
7 Correct 152 ms 22048 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 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1108 KB Output is correct
7 Correct 152 ms 22048 KB Output is correct
8 Correct 1 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 7 ms 1108 KB Output is correct
13 Correct 146 ms 21972 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 792 KB Output is correct
17 Correct 73 ms 12064 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 39 ms 5796 KB Output is correct
21 Correct 167 ms 22044 KB Output is correct
22 Correct 153 ms 21996 KB Output is correct
23 Correct 172 ms 22012 KB Output is correct
24 Correct 157 ms 22048 KB Output is correct
25 Correct 72 ms 12108 KB Output is correct
26 Correct 68 ms 12068 KB Output is correct
27 Correct 168 ms 22020 KB Output is correct
28 Correct 168 ms 22064 KB Output is correct

Subtask #3
19.0 / 19.0

# 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 1 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 212 KB Output is correct
8 Correct 9 ms 1212 KB Output is correct
9 Correct 151 ms 21988 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 7 ms 1376 KB Output is correct
13 Correct 179 ms 26144 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 852 KB Output is correct
17 Correct 96 ms 15008 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 39 ms 5780 KB Output is correct
22 Correct 157 ms 24464 KB Output is correct
23 Correct 160 ms 23964 KB Output is correct
24 Correct 162 ms 27160 KB Output is correct
25 Correct 70 ms 14112 KB Output is correct
26 Correct 74 ms 14604 KB Output is correct
27 Correct 158 ms 23988 KB Output is correct
28 Correct 163 ms 26108 KB Output is correct
29 Correct 70 ms 14108 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 5784 KB Output is correct
5 Correct 154 ms 22048 KB Output is correct
6 Correct 155 ms 22008 KB Output is correct
7 Correct 161 ms 22048 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 47 ms 5804 KB Output is correct
10 Correct 164 ms 24472 KB Output is correct
11 Correct 167 ms 24076 KB Output is correct
12 Correct 163 ms 27164 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 6296 KB Output is correct
17 Correct 159 ms 24476 KB Output is correct
18 Correct 157 ms 24208 KB Output is correct
19 Correct 159 ms 24092 KB Output is correct
20 Correct 154 ms 24016 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 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1108 KB Output is correct
7 Correct 152 ms 22048 KB Output is correct
8 Correct 1 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 7 ms 1108 KB Output is correct
13 Correct 146 ms 21972 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 792 KB Output is correct
17 Correct 73 ms 12064 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 39 ms 5796 KB Output is correct
21 Correct 167 ms 22044 KB Output is correct
22 Correct 153 ms 21996 KB Output is correct
23 Correct 172 ms 22012 KB Output is correct
24 Correct 157 ms 22048 KB Output is correct
25 Correct 72 ms 12108 KB Output is correct
26 Correct 68 ms 12068 KB Output is correct
27 Correct 168 ms 22020 KB Output is correct
28 Correct 168 ms 22064 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 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 212 KB Output is correct
36 Correct 9 ms 1212 KB Output is correct
37 Correct 151 ms 21988 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 7 ms 1376 KB Output is correct
41 Correct 179 ms 26144 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 1 ms 212 KB Output is correct
44 Correct 4 ms 852 KB Output is correct
45 Correct 96 ms 15008 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 39 ms 5780 KB Output is correct
50 Correct 157 ms 24464 KB Output is correct
51 Correct 160 ms 23964 KB Output is correct
52 Correct 162 ms 27160 KB Output is correct
53 Correct 70 ms 14112 KB Output is correct
54 Correct 74 ms 14604 KB Output is correct
55 Correct 158 ms 23988 KB Output is correct
56 Correct 163 ms 26108 KB Output is correct
57 Correct 70 ms 14108 KB Output is correct
58 Correct 1 ms 212 KB Output is correct
59 Correct 0 ms 212 KB Output is correct
60 Correct 3 ms 852 KB Output is correct
61 Correct 71 ms 14100 KB Output is correct
62 Correct 1 ms 212 KB Output is correct
63 Correct 0 ms 328 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 39 ms 6292 KB Output is correct
66 Correct 70 ms 14604 KB Output is correct
67 Correct 68 ms 14148 KB Output is correct
68 Correct 71 ms 14236 KB Output is correct
69 Correct 69 ms 14108 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 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 7 ms 1108 KB Output is correct
7 Correct 152 ms 22048 KB Output is correct
8 Correct 1 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 7 ms 1108 KB Output is correct
13 Correct 146 ms 21972 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 4 ms 792 KB Output is correct
17 Correct 73 ms 12064 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 39 ms 5796 KB Output is correct
21 Correct 167 ms 22044 KB Output is correct
22 Correct 153 ms 21996 KB Output is correct
23 Correct 172 ms 22012 KB Output is correct
24 Correct 157 ms 22048 KB Output is correct
25 Correct 72 ms 12108 KB Output is correct
26 Correct 68 ms 12068 KB Output is correct
27 Correct 168 ms 22020 KB Output is correct
28 Correct 168 ms 22064 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 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 212 KB Output is correct
36 Correct 9 ms 1212 KB Output is correct
37 Correct 151 ms 21988 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 212 KB Output is correct
40 Correct 7 ms 1376 KB Output is correct
41 Correct 179 ms 26144 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 1 ms 212 KB Output is correct
44 Correct 4 ms 852 KB Output is correct
45 Correct 96 ms 15008 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 1 ms 212 KB Output is correct
49 Correct 39 ms 5780 KB Output is correct
50 Correct 157 ms 24464 KB Output is correct
51 Correct 160 ms 23964 KB Output is correct
52 Correct 162 ms 27160 KB Output is correct
53 Correct 70 ms 14112 KB Output is correct
54 Correct 74 ms 14604 KB Output is correct
55 Correct 158 ms 23988 KB Output is correct
56 Correct 163 ms 26108 KB Output is correct
57 Correct 70 ms 14108 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 5784 KB Output is correct
62 Correct 154 ms 22048 KB Output is correct
63 Correct 155 ms 22008 KB Output is correct
64 Correct 161 ms 22048 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 47 ms 5804 KB Output is correct
67 Correct 164 ms 24472 KB Output is correct
68 Correct 167 ms 24076 KB Output is correct
69 Correct 163 ms 27164 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 6296 KB Output is correct
74 Correct 159 ms 24476 KB Output is correct
75 Correct 157 ms 24208 KB Output is correct
76 Correct 159 ms 24092 KB Output is correct
77 Correct 154 ms 24016 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 0 ms 212 KB Output is correct
80 Correct 3 ms 852 KB Output is correct
81 Correct 71 ms 14100 KB Output is correct
82 Correct 1 ms 212 KB Output is correct
83 Correct 0 ms 328 KB Output is correct
84 Correct 1 ms 212 KB Output is correct
85 Correct 39 ms 6292 KB Output is correct
86 Correct 70 ms 14604 KB Output is correct
87 Correct 68 ms 14148 KB Output is correct
88 Correct 71 ms 14236 KB Output is correct
89 Correct 69 ms 14108 KB Output is correct
90 Correct 0 ms 212 KB Output is correct
91 Correct 0 ms 328 KB Output is correct
92 Correct 5 ms 852 KB Output is correct
93 Correct 84 ms 14020 KB Output is correct
94 Correct 1 ms 212 KB Output is correct
95 Correct 1 ms 340 KB Output is correct
96 Correct 1 ms 212 KB Output is correct
97 Correct 23 ms 3692 KB Output is correct
98 Correct 70 ms 14104 KB Output is correct
99 Correct 67 ms 14108 KB Output is correct
100 Correct 66 ms 14096 KB Output is correct
101 Correct 67 ms 14108 KB Output is correct
102 Correct 66 ms 14108 KB Output is correct
103 Correct 70 ms 14104 KB Output is correct
104 Correct 67 ms 14024 KB Output is correct
105 Correct 70 ms 14104 KB Output is correct