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Submission #652029

# Submission time Handle Problem Language Result Execution time Memory
652029 2022-10-21T07:36:24 Z mychecksedad Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 199 ms 22204 KB 
#include <bits/stdc++.h>
#define pb push_back
using namespace std;

struct Dsu{
	vector<int> s, p;
	Dsu(int n){
		s.resize(n + 1, 1);
		p.resize(n + 1);
		for(int i = 0; i <= n; ++i) p[i] = i;
	}
	int find(int v){
		if(p[v] == v) return v;
		return (p[v] = find(p[v]));
	}
	void merge(int a, int b){
		a = find(a);
		b = find(b);
		if(a != b){
			if(s[a] > s[b]) swap(a, b);
			p[a] = b;
			s[b] += s[a];
		}
	}
};
void build(vector<vector<int>> _b);

int construct(vector<vector<int>> p) {
	int n = p.size();
	std::vector<std::vector<int>> answer;
	for (int i = 0; i < n; i++) {
		std::vector<int> row;
		row.resize(n);
		answer.push_back(row);
	}

	Dsu d(n);
	vector<vector<int>> comp;

	bool ok = 1;

	for(int i = 0; i < n; ++i){
		for(int j = 0; j < n; ++j){
			if(p[i][j] == 3){
				return 0;
			}
			if(p[i][j] != 0){
				d.merge(i, j);
			}
		}
	}
	vector<int> s (n, -1);
	for(int i = 0; i < n; ++i){
		int c = d.find(i);
		if(s[c] == -1){
			s[c] = comp.size();
			comp.pb({i});
		}else{
			comp[s[c]].pb(i);
		}
	}
	vector<bool> used(n);
	for(auto v: comp){
		vector<int> in, notin;
		for(int x: v){
			bool inner = 1;
			for(int y: v){
				if(p[x][y] == 0){
					return 0;
				}
				if(p[x][y] != 2 && x != y) inner = 0;
			}
			if(inner){
				in.pb(x);
				used[x] = 1;
			}else{
				notin.pb(x);
			}
		}
		for(int u: notin){
			if(used[u]){
				continue;
			}
			used[u] = 1;
			in.pb(u);
			vector<int> q;
			q.pb(u);
			for(int x: notin){
				if(p[u][x] == 1 && u != x){
					if(used[x]){
						return 0;
					}
					q.pb(x);
					used[x] = 1;
				}
			}
			for(int a: q){
				for(int b: q){
					if(p[a][b] != 1){
						return 0;
					}
				}
			}
			for(int j = 0; j < q.size() - 1; ++j){
				answer[q[j]][q[j + 1]] = 1;
				answer[q[j + 1]][q[j]] = 1;
			}
		}
		if(in.size() == 2){
			return 0;
		}
		if(in.size() > 1){
			for(int j = 0; j < in.size(); ++j){
				answer[in[j]][in[(j + 1) % (in.size())]] = 1;
				answer[in[(j + 1) % (in.size())]][in[j]] = 1;
			}
		}
	}




	build(answer);

	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:104:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  104 |    for(int j = 0; j < q.size() - 1; ++j){
      |                   ~~^~~~~~~~~~~~~~
supertrees.cpp:113:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |    for(int j = 0; j < in.size(); ++j){
      |                   ~~^~~~~~~~~~~
supertrees.cpp:40:7: warning: unused variable 'ok' [-Wunused-variable]
   40 |  bool ok = 1;
      |       ^~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 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 1 ms 212 KB Output is correct
6 Correct 9 ms 1108 KB Output is correct
7 Correct 176 ms 21964 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 1 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 1 ms 212 KB Output is correct
6 Correct 9 ms 1108 KB Output is correct
7 Correct 176 ms 21964 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 170 ms 22100 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 712 KB Output is correct
17 Correct 107 ms 12032 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 44 ms 5708 KB Output is correct
21 Correct 175 ms 22052 KB Output is correct
22 Correct 170 ms 22020 KB Output is correct
23 Correct 187 ms 22024 KB Output is correct
24 Correct 167 ms 22016 KB Output is correct
25 Correct 73 ms 12032 KB Output is correct
26 Correct 70 ms 12160 KB Output is correct
27 Correct 180 ms 21992 KB Output is correct
28 Correct 161 ms 22028 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 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 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 296 KB Output is correct
8 Correct 7 ms 1244 KB Output is correct
9 Correct 167 ms 22164 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 1236 KB Output is correct
13 Correct 188 ms 22188 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 6 ms 852 KB Output is correct
17 Correct 92 ms 12164 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 1 ms 304 KB Output is correct
21 Correct 51 ms 5804 KB Output is correct
22 Correct 190 ms 22128 KB Output is correct
23 Correct 166 ms 22196 KB Output is correct
24 Correct 173 ms 22204 KB Output is correct
25 Correct 72 ms 12292 KB Output is correct
26 Correct 83 ms 12224 KB Output is correct
27 Correct 161 ms 22120 KB Output is correct
28 Correct 199 ms 22148 KB Output is correct
29 Correct 80 ms 12320 KB Output is correct

Subtask #4
35.0 / 35.0

# 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 45 ms 5708 KB Output is correct
5 Correct 192 ms 22020 KB Output is correct
6 Correct 165 ms 22140 KB Output is correct
7 Correct 184 ms 21964 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 48 ms 5764 KB Output is correct
10 Correct 172 ms 22032 KB Output is correct
11 Correct 172 ms 22092 KB Output is correct
12 Correct 183 ms 22024 KB Output is correct
13 Correct 1 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 49 ms 5732 KB Output is correct
17 Correct 190 ms 22020 KB Output is correct
18 Correct 169 ms 21964 KB Output is correct
19 Correct 163 ms 22056 KB Output is correct
20 Correct 176 ms 22180 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 1 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 1 ms 212 KB Output is correct
6 Correct 9 ms 1108 KB Output is correct
7 Correct 176 ms 21964 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 170 ms 22100 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 712 KB Output is correct
17 Correct 107 ms 12032 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 44 ms 5708 KB Output is correct
21 Correct 175 ms 22052 KB Output is correct
22 Correct 170 ms 22020 KB Output is correct
23 Correct 187 ms 22024 KB Output is correct
24 Correct 167 ms 22016 KB Output is correct
25 Correct 73 ms 12032 KB Output is correct
26 Correct 70 ms 12160 KB Output is correct
27 Correct 180 ms 21992 KB Output is correct
28 Correct 161 ms 22028 KB Output is correct
29 Correct 1 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 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 296 KB Output is correct
36 Correct 7 ms 1244 KB Output is correct
37 Correct 167 ms 22164 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 1236 KB Output is correct
41 Correct 188 ms 22188 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 1 ms 212 KB Output is correct
44 Correct 6 ms 852 KB Output is correct
45 Correct 92 ms 12164 KB Output is correct
46 Correct 1 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 1 ms 304 KB Output is correct
49 Correct 51 ms 5804 KB Output is correct
50 Correct 190 ms 22128 KB Output is correct
51 Correct 166 ms 22196 KB Output is correct
52 Correct 173 ms 22204 KB Output is correct
53 Correct 72 ms 12292 KB Output is correct
54 Correct 83 ms 12224 KB Output is correct
55 Correct 161 ms 22120 KB Output is correct
56 Correct 199 ms 22148 KB Output is correct
57 Correct 80 ms 12320 KB Output is correct
58 Correct 1 ms 212 KB Output is correct
59 Correct 1 ms 212 KB Output is correct
60 Correct 4 ms 824 KB Output is correct
61 Correct 78 ms 14072 KB Output is correct
62 Correct 1 ms 212 KB Output is correct
63 Correct 1 ms 212 KB Output is correct
64 Correct 1 ms 300 KB Output is correct
65 Correct 61 ms 6272 KB Output is correct
66 Correct 70 ms 14072 KB Output is correct
67 Correct 71 ms 14028 KB Output is correct
68 Correct 71 ms 14028 KB Output is correct
69 Correct 75 ms 14116 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 1 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 1 ms 212 KB Output is correct
6 Correct 9 ms 1108 KB Output is correct
7 Correct 176 ms 21964 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 170 ms 22100 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 4 ms 712 KB Output is correct
17 Correct 107 ms 12032 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 44 ms 5708 KB Output is correct
21 Correct 175 ms 22052 KB Output is correct
22 Correct 170 ms 22020 KB Output is correct
23 Correct 187 ms 22024 KB Output is correct
24 Correct 167 ms 22016 KB Output is correct
25 Correct 73 ms 12032 KB Output is correct
26 Correct 70 ms 12160 KB Output is correct
27 Correct 180 ms 21992 KB Output is correct
28 Correct 161 ms 22028 KB Output is correct
29 Correct 1 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 1 ms 212 KB Output is correct
34 Correct 1 ms 212 KB Output is correct
35 Correct 1 ms 296 KB Output is correct
36 Correct 7 ms 1244 KB Output is correct
37 Correct 167 ms 22164 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 1236 KB Output is correct
41 Correct 188 ms 22188 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 1 ms 212 KB Output is correct
44 Correct 6 ms 852 KB Output is correct
45 Correct 92 ms 12164 KB Output is correct
46 Correct 1 ms 212 KB Output is correct
47 Correct 1 ms 212 KB Output is correct
48 Correct 1 ms 304 KB Output is correct
49 Correct 51 ms 5804 KB Output is correct
50 Correct 190 ms 22128 KB Output is correct
51 Correct 166 ms 22196 KB Output is correct
52 Correct 173 ms 22204 KB Output is correct
53 Correct 72 ms 12292 KB Output is correct
54 Correct 83 ms 12224 KB Output is correct
55 Correct 161 ms 22120 KB Output is correct
56 Correct 199 ms 22148 KB Output is correct
57 Correct 80 ms 12320 KB Output is correct
58 Correct 1 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 45 ms 5708 KB Output is correct
62 Correct 192 ms 22020 KB Output is correct
63 Correct 165 ms 22140 KB Output is correct
64 Correct 184 ms 21964 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 48 ms 5764 KB Output is correct
67 Correct 172 ms 22032 KB Output is correct
68 Correct 172 ms 22092 KB Output is correct
69 Correct 183 ms 22024 KB Output is correct
70 Correct 1 ms 212 KB Output is correct
71 Correct 1 ms 212 KB Output is correct
72 Correct 1 ms 212 KB Output is correct
73 Correct 49 ms 5732 KB Output is correct
74 Correct 190 ms 22020 KB Output is correct
75 Correct 169 ms 21964 KB Output is correct
76 Correct 163 ms 22056 KB Output is correct
77 Correct 176 ms 22180 KB Output is correct
78 Correct 1 ms 212 KB Output is correct
79 Correct 1 ms 212 KB Output is correct
80 Correct 4 ms 824 KB Output is correct
81 Correct 78 ms 14072 KB Output is correct
82 Correct 1 ms 212 KB Output is correct
83 Correct 1 ms 212 KB Output is correct
84 Correct 1 ms 300 KB Output is correct
85 Correct 61 ms 6272 KB Output is correct
86 Correct 70 ms 14072 KB Output is correct
87 Correct 71 ms 14028 KB Output is correct
88 Correct 71 ms 14028 KB Output is correct
89 Correct 75 ms 14116 KB Output is correct
90 Correct 1 ms 212 KB Output is correct
91 Correct 1 ms 212 KB Output is correct
92 Correct 3 ms 824 KB Output is correct
93 Correct 75 ms 14068 KB Output is correct
94 Correct 1 ms 300 KB Output is correct
95 Correct 2 ms 212 KB Output is correct
96 Correct 1 ms 212 KB Output is correct
97 Correct 20 ms 3700 KB Output is correct
98 Correct 78 ms 14156 KB Output is correct
99 Correct 71 ms 14080 KB Output is correct
100 Correct 68 ms 14068 KB Output is correct
101 Correct 71 ms 14028 KB Output is correct
102 Correct 71 ms 14068 KB Output is correct
103 Correct 76 ms 14072 KB Output is correct
104 Correct 92 ms 14064 KB Output is correct
105 Correct 90 ms 14068 KB Output is correct