oj.uz

Submission #715752

# Submission time Handle Problem Language Result Execution time Memory
715752 2023-03-27T18:50:18 Z n1k Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 278 ms 26112 KB 
#include "supertrees.h"
#include <vector>
#include <bits/stdc++.h>
 
using namespace std;
 
#define sz(a) (a).size()
 
vector<vector<int>> components;
vector<bool> vis;
std::vector<std::vector<int>> adj;
int n;
 
bool dfs(int u){
	vis[u] = 1;
	// u connectet to all in component
	for(auto v : components[sz(components) - 1]){
		if(!adj[v][u]){
			return false;
		}
	}
	components[sz(components) - 1].push_back(u);
	for(int v = 0; v < n; v++){
		if(vis[v]){
			continue;
		}
		if(adj[u][v]){
			if(!dfs(v)){
				return false;
			}
		}
	}
	return true;
}
 
int construct(std::vector<std::vector<int>> p) {
	adj = p;
	n = p.size();
	vis.resize(n);
	for(int i = 0; i < n; i++){
		for(int j = 0; j < n; j++){
			if(p[i][j] == 3){
				return 0;
			}
		}
	}
	// p[i][j] = 1 -> same component
	// p[j][k] = 1 -> p[i][k] = 1
	// add j
	// j -> has connection to all in component
	// dfs -> j
	
	for(int u = 0; u < n; u++){
		if(vis[u]){
			continue;
		}
		components.push_back(vector<int>());
		if(!dfs(u)){
			return 0;
		}
	}

	vis.assign(n, 0);
	// construckt trees
	vector<vector<int>> mat(n, vector<int>(n));	
	for(auto comp : components){
		vector<int> roots;
		for(auto u : comp){
			if(vis[u]){
				continue;
			}
			roots.push_back(u);
			for(int i = 0; i < n; i++){
				if(u == i){
					continue;
				}
				if(p[u][i] == 1){
					vis[i] = 1;
					mat[u][i] = mat[i][u] = 1;
				}
			}
		}
		if(sz(roots) == 2){
			return 0;
		}else if(sz(roots) > 2){
			for(int i = 0; i < sz(roots); i++){
				mat[roots[i]][roots[(i + 1) % sz(roots)]] = mat[roots[(i + 1) % sz(roots)]][roots[i]] = 1;
			}
		}
	}
 
	build(mat);
 
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:86:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |    for(int i = 0; i < sz(roots); i++){
      |                     ^

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 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 14 ms 1364 KB Output is correct
7 Correct 278 ms 26028 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 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 14 ms 1364 KB Output is correct
7 Correct 278 ms 26028 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 9 ms 1364 KB Output is correct
13 Correct 200 ms 25984 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 5 ms 716 KB Output is correct
17 Correct 89 ms 12036 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 69 ms 6776 KB Output is correct
21 Correct 181 ms 26112 KB Output is correct
22 Correct 183 ms 26060 KB Output is correct
23 Correct 191 ms 25916 KB Output is correct
24 Correct 193 ms 26024 KB Output is correct
25 Correct 73 ms 12048 KB Output is correct
26 Correct 71 ms 12036 KB Output is correct
27 Correct 217 ms 26016 KB Output is correct
28 Correct 177 ms 26044 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 8 ms 1364 KB Output is correct
9 Correct 181 ms 26060 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 8 ms 1364 KB Output is correct
13 Correct 217 ms 25988 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 5 ms 716 KB Output is correct
17 Correct 81 ms 12040 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 56 ms 6732 KB Output is correct
22 Correct 179 ms 25996 KB Output is correct
23 Correct 194 ms 25988 KB Output is correct
24 Correct 192 ms 25996 KB Output is correct
25 Correct 109 ms 16076 KB Output is correct
26 Correct 79 ms 12048 KB Output is correct
27 Correct 176 ms 25992 KB Output is correct
28 Correct 238 ms 26032 KB Output is correct
29 Correct 74 ms 16136 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 50 ms 6664 KB Output is correct
5 Correct 183 ms 25948 KB Output is correct
6 Correct 181 ms 25976 KB Output is correct
7 Correct 192 ms 26060 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 49 ms 6708 KB Output is correct
10 Correct 186 ms 26000 KB Output is correct
11 Correct 196 ms 26032 KB Output is correct
12 Correct 206 ms 25972 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 53 ms 6664 KB Output is correct
17 Correct 179 ms 25996 KB Output is correct
18 Correct 203 ms 25988 KB Output is correct
19 Correct 186 ms 26096 KB Output is correct
20 Correct 206 ms 25984 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 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 14 ms 1364 KB Output is correct
7 Correct 278 ms 26028 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 9 ms 1364 KB Output is correct
13 Correct 200 ms 25984 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 5 ms 716 KB Output is correct
17 Correct 89 ms 12036 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 69 ms 6776 KB Output is correct
21 Correct 181 ms 26112 KB Output is correct
22 Correct 183 ms 26060 KB Output is correct
23 Correct 191 ms 25916 KB Output is correct
24 Correct 193 ms 26024 KB Output is correct
25 Correct 73 ms 12048 KB Output is correct
26 Correct 71 ms 12036 KB Output is correct
27 Correct 217 ms 26016 KB Output is correct
28 Correct 177 ms 26044 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 8 ms 1364 KB Output is correct
37 Correct 181 ms 26060 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 8 ms 1364 KB Output is correct
41 Correct 217 ms 25988 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 5 ms 716 KB Output is correct
45 Correct 81 ms 12040 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 56 ms 6732 KB Output is correct
50 Correct 179 ms 25996 KB Output is correct
51 Correct 194 ms 25988 KB Output is correct
52 Correct 192 ms 25996 KB Output is correct
53 Correct 109 ms 16076 KB Output is correct
54 Correct 79 ms 12048 KB Output is correct
55 Correct 176 ms 25992 KB Output is correct
56 Correct 238 ms 26032 KB Output is correct
57 Correct 74 ms 16136 KB Output is correct
58 Correct 0 ms 212 KB Output is correct
59 Correct 0 ms 212 KB Output is correct
60 Correct 5 ms 724 KB Output is correct
61 Correct 90 ms 12032 KB Output is correct
62 Correct 1 ms 212 KB Output is correct
63 Correct 0 ms 212 KB Output is correct
64 Correct 1 ms 212 KB Output is correct
65 Correct 47 ms 6768 KB Output is correct
66 Correct 75 ms 12036 KB Output is correct
67 Correct 73 ms 12048 KB Output is correct
68 Correct 72 ms 12048 KB Output is correct
69 Correct 76 ms 16076 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 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 14 ms 1364 KB Output is correct
7 Correct 278 ms 26028 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 9 ms 1364 KB Output is correct
13 Correct 200 ms 25984 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 5 ms 716 KB Output is correct
17 Correct 89 ms 12036 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 212 KB Output is correct
20 Correct 69 ms 6776 KB Output is correct
21 Correct 181 ms 26112 KB Output is correct
22 Correct 183 ms 26060 KB Output is correct
23 Correct 191 ms 25916 KB Output is correct
24 Correct 193 ms 26024 KB Output is correct
25 Correct 73 ms 12048 KB Output is correct
26 Correct 71 ms 12036 KB Output is correct
27 Correct 217 ms 26016 KB Output is correct
28 Correct 177 ms 26044 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 8 ms 1364 KB Output is correct
37 Correct 181 ms 26060 KB Output is correct
38 Correct 0 ms 212 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 8 ms 1364 KB Output is correct
41 Correct 217 ms 25988 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 0 ms 212 KB Output is correct
44 Correct 5 ms 716 KB Output is correct
45 Correct 81 ms 12040 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 56 ms 6732 KB Output is correct
50 Correct 179 ms 25996 KB Output is correct
51 Correct 194 ms 25988 KB Output is correct
52 Correct 192 ms 25996 KB Output is correct
53 Correct 109 ms 16076 KB Output is correct
54 Correct 79 ms 12048 KB Output is correct
55 Correct 176 ms 25992 KB Output is correct
56 Correct 238 ms 26032 KB Output is correct
57 Correct 74 ms 16136 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 50 ms 6664 KB Output is correct
62 Correct 183 ms 25948 KB Output is correct
63 Correct 181 ms 25976 KB Output is correct
64 Correct 192 ms 26060 KB Output is correct
65 Correct 0 ms 212 KB Output is correct
66 Correct 49 ms 6708 KB Output is correct
67 Correct 186 ms 26000 KB Output is correct
68 Correct 196 ms 26032 KB Output is correct
69 Correct 206 ms 25972 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 53 ms 6664 KB Output is correct
74 Correct 179 ms 25996 KB Output is correct
75 Correct 203 ms 25988 KB Output is correct
76 Correct 186 ms 26096 KB Output is correct
77 Correct 206 ms 25984 KB Output is correct
78 Correct 0 ms 212 KB Output is correct
79 Correct 0 ms 212 KB Output is correct
80 Correct 5 ms 724 KB Output is correct
81 Correct 90 ms 12032 KB Output is correct
82 Correct 1 ms 212 KB Output is correct
83 Correct 0 ms 212 KB Output is correct
84 Correct 1 ms 212 KB Output is correct
85 Correct 47 ms 6768 KB Output is correct
86 Correct 75 ms 12036 KB Output is correct
87 Correct 73 ms 12048 KB Output is correct
88 Correct 72 ms 12048 KB Output is correct
89 Correct 76 ms 16076 KB Output is correct
90 Correct 1 ms 212 KB Output is correct
91 Correct 0 ms 212 KB Output is correct
92 Correct 4 ms 724 KB Output is correct
93 Correct 83 ms 12040 KB Output is correct
94 Correct 0 ms 212 KB Output is correct
95 Correct 1 ms 212 KB Output is correct
96 Correct 1 ms 212 KB Output is correct
97 Correct 20 ms 3708 KB Output is correct
98 Correct 80 ms 14080 KB Output is correct
99 Correct 72 ms 14068 KB Output is correct
100 Correct 72 ms 14072 KB Output is correct
101 Correct 77 ms 14072 KB Output is correct
102 Correct 80 ms 14080 KB Output is correct
103 Correct 79 ms 14072 KB Output is correct
104 Correct 84 ms 14068 KB Output is correct
105 Correct 83 ms 14028 KB Output is correct