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Submission #770827

# Submission time Handle Problem Language Result Execution time Memory
770827 2023-07-02T03:29:06 Z SanguineChameleon Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 187 ms 27996 KB 
#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;

const int maxn = 1e3 + 20;
int cnt[maxn][maxn];
vector<vector<int>> res;
bool flag[maxn];
int n;

void add_edge(int u, int v) {
	res[u][v] = true;
	res[v][u] = true;
}

bool solve(vector<int> comp) {
	for (auto u: comp) {
		for (auto v: comp) {
			if (cnt[u][v] == 0) {
				return false;
			}
		}
	}
	for (auto i: comp) {
		flag[i] = false;
	}
	vector<vector<int>> chains;
	for (auto i: comp) {
		if (!flag[i]) {
			flag[i] = true;
			vector<int> chain = {i};
			int pt = 0;
			int sz = 1;
			while (pt < sz) {
				int u = chain[pt++];
				for (int v = 0; v < n; v++) {
					if (!flag[v] && cnt[u][v] == 1) {
						flag[v] = true;
						chain.push_back(v);
						sz++;
					} 
				}
			}
			for (auto u: chain) {
				for (auto v: chain) {
					if (cnt[u][v] != 1) {
						return false;
					}
				}
			}
			for (int i = 0; i < (int)chain.size() - 1; i++) {
				add_edge(chain[i], chain[i + 1]);
			}
			chains.push_back(chain);
		}
	}
	int sz = chains.size();
	if (sz == 2) {
		return false;
	}
	if (sz >= 3) {
		for (int i = 0; i < sz; i++) {
			add_edge(chains[i].back(), chains[(i + 1) % sz].back());
		}
	}
	return true;
}

int construct(vector<vector<int>> _cnt) {
	n = _cnt.size();
	res.resize(n, vector<int>(n, 0));
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			cnt[i][j] = _cnt[i][j];
			if (cnt[i][j] == 3) {
				return 0;
			}
		}
	}
	for (int i = 0; i < n; i++) {
		if (!flag[i]) {
			flag[i] = true;
			vector<int> comp = {i};
			int pt = 0;
			int sz = 1;
			while (pt < sz) {
				int u = comp[pt++];
				for (int v = 0; v < n; v++) {
					if (!flag[v] && cnt[u][v] > 0) {
						flag[v] = true;
						comp.push_back(v);
						sz++;
					} 
				}
			}
			if (!solve(comp)) {
				return 0;
			}
		}
	}
	build(res);
	return 1;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 340 KB Output is correct
6 Correct 7 ms 2004 KB Output is correct
7 Correct 154 ms 26004 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 340 KB Output is correct
6 Correct 7 ms 2004 KB Output is correct
7 Correct 154 ms 26004 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 340 KB Output is correct
12 Correct 7 ms 1960 KB Output is correct
13 Correct 158 ms 25932 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 3 ms 1492 KB Output is correct
17 Correct 77 ms 16020 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 41 ms 7684 KB Output is correct
21 Correct 160 ms 25936 KB Output is correct
22 Correct 155 ms 25932 KB Output is correct
23 Correct 187 ms 26080 KB Output is correct
24 Correct 151 ms 25932 KB Output is correct
25 Correct 63 ms 16008 KB Output is correct
26 Correct 60 ms 16120 KB Output is correct
27 Correct 161 ms 25996 KB Output is correct
28 Correct 150 ms 25992 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 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 340 KB Output is correct
8 Correct 7 ms 1876 KB Output is correct
9 Correct 151 ms 26008 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 1 ms 304 KB Output is correct
12 Correct 7 ms 2004 KB Output is correct
13 Correct 181 ms 26008 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 3 ms 1492 KB Output is correct
17 Correct 64 ms 16140 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 38 ms 7696 KB Output is correct
22 Correct 152 ms 26024 KB Output is correct
23 Correct 152 ms 26012 KB Output is correct
24 Correct 156 ms 26120 KB Output is correct
25 Correct 62 ms 16076 KB Output is correct
26 Correct 61 ms 16076 KB Output is correct
27 Correct 181 ms 25924 KB Output is correct
28 Correct 158 ms 26132 KB Output is correct
29 Correct 63 ms 16024 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 7728 KB Output is correct
5 Correct 152 ms 26004 KB Output is correct
6 Correct 150 ms 25972 KB Output is correct
7 Correct 155 ms 26012 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 42 ms 7764 KB Output is correct
10 Correct 154 ms 25996 KB Output is correct
11 Correct 151 ms 26024 KB Output is correct
12 Correct 155 ms 25928 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 40 ms 8188 KB Output is correct
17 Correct 153 ms 27960 KB Output is correct
18 Correct 152 ms 27996 KB Output is correct
19 Correct 150 ms 27960 KB Output is correct
20 Correct 185 ms 27916 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 340 KB Output is correct
6 Correct 7 ms 2004 KB Output is correct
7 Correct 154 ms 26004 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 340 KB Output is correct
12 Correct 7 ms 1960 KB Output is correct
13 Correct 158 ms 25932 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 3 ms 1492 KB Output is correct
17 Correct 77 ms 16020 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 41 ms 7684 KB Output is correct
21 Correct 160 ms 25936 KB Output is correct
22 Correct 155 ms 25932 KB Output is correct
23 Correct 187 ms 26080 KB Output is correct
24 Correct 151 ms 25932 KB Output is correct
25 Correct 63 ms 16008 KB Output is correct
26 Correct 60 ms 16120 KB Output is correct
27 Correct 161 ms 25996 KB Output is correct
28 Correct 150 ms 25992 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 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 340 KB Output is correct
36 Correct 7 ms 1876 KB Output is correct
37 Correct 151 ms 26008 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 304 KB Output is correct
40 Correct 7 ms 2004 KB Output is correct
41 Correct 181 ms 26008 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 3 ms 1492 KB Output is correct
45 Correct 64 ms 16140 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 38 ms 7696 KB Output is correct
50 Correct 152 ms 26024 KB Output is correct
51 Correct 152 ms 26012 KB Output is correct
52 Correct 156 ms 26120 KB Output is correct
53 Correct 62 ms 16076 KB Output is correct
54 Correct 61 ms 16076 KB Output is correct
55 Correct 181 ms 25924 KB Output is correct
56 Correct 158 ms 26132 KB Output is correct
57 Correct 63 ms 16024 KB Output is correct
58 Correct 0 ms 212 KB Output is correct
59 Correct 0 ms 340 KB Output is correct
60 Correct 3 ms 1492 KB Output is correct
61 Correct 63 ms 16140 KB Output is correct
62 Correct 0 ms 212 KB Output is correct
63 Correct 0 ms 340 KB Output is correct
64 Correct 0 ms 340 KB Output is correct
65 Correct 39 ms 7748 KB Output is correct
66 Correct 76 ms 18044 KB Output is correct
67 Correct 62 ms 18048 KB Output is correct
68 Correct 62 ms 18048 KB Output is correct
69 Correct 64 ms 18048 KB Output is correct

Subtask #6
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 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 340 KB Output is correct
6 Correct 7 ms 2004 KB Output is correct
7 Correct 154 ms 26004 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 340 KB Output is correct
12 Correct 7 ms 1960 KB Output is correct
13 Correct 158 ms 25932 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 3 ms 1492 KB Output is correct
17 Correct 77 ms 16020 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 41 ms 7684 KB Output is correct
21 Correct 160 ms 25936 KB Output is correct
22 Correct 155 ms 25932 KB Output is correct
23 Correct 187 ms 26080 KB Output is correct
24 Correct 151 ms 25932 KB Output is correct
25 Correct 63 ms 16008 KB Output is correct
26 Correct 60 ms 16120 KB Output is correct
27 Correct 161 ms 25996 KB Output is correct
28 Correct 150 ms 25992 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 0 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 340 KB Output is correct
36 Correct 7 ms 1876 KB Output is correct
37 Correct 151 ms 26008 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 1 ms 304 KB Output is correct
40 Correct 7 ms 2004 KB Output is correct
41 Correct 181 ms 26008 KB Output is correct
42 Correct 0 ms 212 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 3 ms 1492 KB Output is correct
45 Correct 64 ms 16140 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 38 ms 7696 KB Output is correct
50 Correct 152 ms 26024 KB Output is correct
51 Correct 152 ms 26012 KB Output is correct
52 Correct 156 ms 26120 KB Output is correct
53 Correct 62 ms 16076 KB Output is correct
54 Correct 61 ms 16076 KB Output is correct
55 Correct 181 ms 25924 KB Output is correct
56 Correct 158 ms 26132 KB Output is correct
57 Correct 63 ms 16024 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 7728 KB Output is correct
62 Correct 152 ms 26004 KB Output is correct
63 Correct 150 ms 25972 KB Output is correct
64 Correct 155 ms 26012 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 42 ms 7764 KB Output is correct
67 Correct 154 ms 25996 KB Output is correct
68 Correct 151 ms 26024 KB Output is correct
69 Correct 155 ms 25928 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 0 ms 340 KB Output is correct
72 Correct 0 ms 212 KB Output is correct
73 Correct 40 ms 8188 KB Output is correct
74 Correct 153 ms 27960 KB Output is correct
75 Correct 152 ms 27996 KB Output is correct
76 Correct 150 ms 27960 KB Output is correct
77 Correct 185 ms 27916 KB Output is correct
78 Correct 0 ms 212 KB Output is correct
79 Correct 0 ms 340 KB Output is correct
80 Correct 3 ms 1492 KB Output is correct
81 Correct 63 ms 16140 KB Output is correct
82 Correct 0 ms 212 KB Output is correct
83 Correct 0 ms 340 KB Output is correct
84 Correct 0 ms 340 KB Output is correct
85 Correct 39 ms 7748 KB Output is correct
86 Correct 76 ms 18044 KB Output is correct
87 Correct 62 ms 18048 KB Output is correct
88 Correct 62 ms 18048 KB Output is correct
89 Correct 64 ms 18048 KB Output is correct
90 Correct 1 ms 212 KB Output is correct
91 Correct 0 ms 212 KB Output is correct
92 Correct 3 ms 852 KB Output is correct
93 Correct 69 ms 14080 KB Output is correct
94 Correct 0 ms 212 KB Output is correct
95 Correct 0 ms 212 KB Output is correct
96 Correct 0 ms 304 KB Output is correct
97 Correct 15 ms 3852 KB Output is correct
98 Correct 60 ms 14284 KB Output is correct
99 Correct 60 ms 14600 KB Output is correct
100 Correct 60 ms 14352 KB Output is correct
101 Correct 58 ms 15408 KB Output is correct
102 Correct 70 ms 14204 KB Output is correct
103 Correct 62 ms 14088 KB Output is correct
104 Correct 59 ms 14092 KB Output is correct
105 Correct 63 ms 14096 KB Output is correct