oj.uz

Submission #567649

# Submission time Handle Problem Language Result Execution time Memory
567649 2022-05-23T23:56:13 Z pere_gil Connecting Supertrees (IOI20_supertrees) C++17
100 / 100
 227 ms 22524 KB 
#include "supertrees.h"
#include "bits/stdc++.h"
using namespace std;

#define vvi vector<vector<int> >

struct union_find{
	vector<int> p;
	void init(int n){
		p.resize(n);
		iota(p.begin(),p.end(),0);
	}
	int find_set(int n){
		return (n==p[n]) ? n : p[n]=find_set(p[n]);
	}
	bool same_set(int a, int b){
		return find_set(a)==find_set(b);
	}
	void union_set(int a, int b){
		if(!same_set(a,b)) p[find_set(a)]=find_set(b);
	}
};

/*
void init(int n, vector<int> &p){
	for(int i=0;i<n;i++) p[i]=i;
}
int find_set(int n, vector<int> &p){
	return (n==p[n]) ? n : p[n]=find_set(p[n],p);
}
bool same_set(int a, int b, vector<int> &p){
	return find_set(a,p)==find_set(b,p);
}
void union_set(int a, int b, vector<int> &p){
	if(!same_set(a,b,p)) p[find_set(a,p)]=find_set(b,p);
}
*/

void join_1(vector<int> &g, vvi &res){
	for(int i=1;i<g.size();i++)
		res[g[i-1]][g[i]]=res[g[i]][g[i-1]]=1;
}
bool join_2(vector<int> &g, vvi &res){
	if(g.size()==1) return true;
	if(g.size()<3) return false;
	for(int i=0;i<g.size();i++){
		int j=(i+1)%g.size();
		res[g[i]][g[j]]=res[g[j]][g[i]]=1;
	}
	return true;
}

bool make_group(int n, vector<int> &g, vvi &v, vvi &res){
	//vector<int> p(n);
	//init(n,p);
	union_find p; p.init(n);

	unordered_set<int> mid;
	for(int i=0;i<g.size();i++){
		int aux=0;
		for(int j=0;j<g.size();j++)
			if(v[g[i]][g[j]]==1) p.union_set(g[i],g[j]);
			else aux++;
		if(aux==g.size()-1) mid.insert(g[i]);
	}
	vvi one(n);
	for(int i=0;i<g.size();i++){
		if(mid.find(g[i])==mid.end())
			one[p.find_set(g[i])].push_back(g[i]);
		if(g[i]==p.find_set(g[i])) mid.insert(g[i]);
	}
	vector<int> v_mid(mid.begin(),mid.end());

	for(int i=0;i<n;i++)
		if(one[i].size()) join_1(one[i],res);
	return join_2(v_mid,res);
}

int construct(vvi v){
	int n=v.size();

	//vector<int> p(n);
	//init(n,p);
	union_find p; p.init(n);
	for(int i=0;i<n;i++)
		for(int j=0;j<n;j++)
			if(v[i][j]) p.union_set(i,j);

    vvi g(n);
	for(int i=0;i<n;i++)
		g[p.find_set(i)].push_back(i);

	for(int i=0;i<n;i++)
		for(int j=0;j<n;j++)
			if((p.same_set(i,j) && v[i][j]==0) || v[i][j]==3) return 0;

	vvi res(n,vector<int> (n,0));
	for(int i=0;i<n;i++)
		if(g[i].size()>0)
			if(!make_group(n,g[i],v,res)) return 0;

	build(res);
	return 1;
}

Compilation message

supertrees.cpp: In function 'void join_1(std::vector<int>&, std::vector<std::vector<int> >&)':
supertrees.cpp:40:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |  for(int i=1;i<g.size();i++)
      |              ~^~~~~~~~~
supertrees.cpp: In function 'bool join_2(std::vector<int>&, std::vector<std::vector<int> >&)':
supertrees.cpp:46:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |  for(int i=0;i<g.size();i++){
      |              ~^~~~~~~~~
supertrees.cpp: In function 'bool make_group(int, std::vector<int>&, std::vector<std::vector<int> >&, std::vector<std::vector<int> >&)':
supertrees.cpp:59:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |  for(int i=0;i<g.size();i++){
      |              ~^~~~~~~~~
supertrees.cpp:61:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |   for(int j=0;j<g.size();j++)
      |               ~^~~~~~~~~
supertrees.cpp:64:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |   if(aux==g.size()-1) mid.insert(g[i]);
      |      ~~~^~~~~~~~~~~~
supertrees.cpp:67:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |  for(int i=0;i<g.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 1 ms 300 KB Output is correct
3 Correct 1 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 9 ms 1236 KB Output is correct
7 Correct 207 ms 22148 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 300 KB Output is correct
3 Correct 1 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 9 ms 1236 KB Output is correct
7 Correct 207 ms 22148 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 300 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 8 ms 1236 KB Output is correct
13 Correct 188 ms 22332 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 692 KB Output is correct
17 Correct 85 ms 8592 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 64 ms 5836 KB Output is correct
21 Correct 171 ms 22332 KB Output is correct
22 Correct 174 ms 22448 KB Output is correct
23 Correct 182 ms 22268 KB Output is correct
24 Correct 202 ms 22328 KB Output is correct
25 Correct 80 ms 8556 KB Output is correct
26 Correct 67 ms 8592 KB Output is correct
27 Correct 227 ms 22524 KB Output is correct
28 Correct 181 ms 22296 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 1 ms 212 KB Output is correct
3 Correct 1 ms 296 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 1 ms 296 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 9 ms 1180 KB Output is correct
9 Correct 206 ms 22256 KB Output is correct
10 Correct 1 ms 212 KB Output is correct
11 Correct 1 ms 296 KB Output is correct
12 Correct 11 ms 1260 KB Output is correct
13 Correct 201 ms 22276 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 300 KB Output is correct
16 Correct 4 ms 596 KB Output is correct
17 Correct 78 ms 8496 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 212 KB Output is correct
21 Correct 45 ms 5836 KB Output is correct
22 Correct 191 ms 22264 KB Output is correct
23 Correct 182 ms 22228 KB Output is correct
24 Correct 180 ms 22432 KB Output is correct
25 Correct 85 ms 12592 KB Output is correct
26 Correct 74 ms 8604 KB Output is correct
27 Correct 165 ms 22316 KB Output is correct
28 Correct 227 ms 22240 KB Output is correct
29 Correct 71 ms 12572 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 1 ms 308 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 56 ms 5896 KB Output is correct
5 Correct 181 ms 22344 KB Output is correct
6 Correct 219 ms 22260 KB Output is correct
7 Correct 185 ms 22348 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 49 ms 5956 KB Output is correct
10 Correct 183 ms 22312 KB Output is correct
11 Correct 223 ms 22320 KB Output is correct
12 Correct 203 ms 22376 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 300 KB Output is correct
16 Correct 44 ms 5940 KB Output is correct
17 Correct 183 ms 22336 KB Output is correct
18 Correct 169 ms 22340 KB Output is correct
19 Correct 184 ms 22316 KB Output is correct
20 Correct 170 ms 22272 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 300 KB Output is correct
3 Correct 1 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 9 ms 1236 KB Output is correct
7 Correct 207 ms 22148 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 300 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 8 ms 1236 KB Output is correct
13 Correct 188 ms 22332 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 692 KB Output is correct
17 Correct 85 ms 8592 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 64 ms 5836 KB Output is correct
21 Correct 171 ms 22332 KB Output is correct
22 Correct 174 ms 22448 KB Output is correct
23 Correct 182 ms 22268 KB Output is correct
24 Correct 202 ms 22328 KB Output is correct
25 Correct 80 ms 8556 KB Output is correct
26 Correct 67 ms 8592 KB Output is correct
27 Correct 227 ms 22524 KB Output is correct
28 Correct 181 ms 22296 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 296 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 296 KB Output is correct
35 Correct 1 ms 304 KB Output is correct
36 Correct 9 ms 1180 KB Output is correct
37 Correct 206 ms 22256 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 296 KB Output is correct
40 Correct 11 ms 1260 KB Output is correct
41 Correct 201 ms 22276 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 1 ms 300 KB Output is correct
44 Correct 4 ms 596 KB Output is correct
45 Correct 78 ms 8496 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 212 KB Output is correct
49 Correct 45 ms 5836 KB Output is correct
50 Correct 191 ms 22264 KB Output is correct
51 Correct 182 ms 22228 KB Output is correct
52 Correct 180 ms 22432 KB Output is correct
53 Correct 85 ms 12592 KB Output is correct
54 Correct 74 ms 8604 KB Output is correct
55 Correct 165 ms 22316 KB Output is correct
56 Correct 227 ms 22240 KB Output is correct
57 Correct 71 ms 12572 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 596 KB Output is correct
61 Correct 76 ms 8616 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 212 KB Output is correct
65 Correct 48 ms 5900 KB Output is correct
66 Correct 78 ms 8524 KB Output is correct
67 Correct 67 ms 8600 KB Output is correct
68 Correct 66 ms 8608 KB Output is correct
69 Correct 72 ms 12512 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 300 KB Output is correct
3 Correct 1 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 9 ms 1236 KB Output is correct
7 Correct 207 ms 22148 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 300 KB Output is correct
11 Correct 1 ms 212 KB Output is correct
12 Correct 8 ms 1236 KB Output is correct
13 Correct 188 ms 22332 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 692 KB Output is correct
17 Correct 85 ms 8592 KB Output is correct
18 Correct 1 ms 212 KB Output is correct
19 Correct 1 ms 300 KB Output is correct
20 Correct 64 ms 5836 KB Output is correct
21 Correct 171 ms 22332 KB Output is correct
22 Correct 174 ms 22448 KB Output is correct
23 Correct 182 ms 22268 KB Output is correct
24 Correct 202 ms 22328 KB Output is correct
25 Correct 80 ms 8556 KB Output is correct
26 Correct 67 ms 8592 KB Output is correct
27 Correct 227 ms 22524 KB Output is correct
28 Correct 181 ms 22296 KB Output is correct
29 Correct 0 ms 212 KB Output is correct
30 Correct 1 ms 212 KB Output is correct
31 Correct 1 ms 296 KB Output is correct
32 Correct 1 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 1 ms 296 KB Output is correct
35 Correct 1 ms 304 KB Output is correct
36 Correct 9 ms 1180 KB Output is correct
37 Correct 206 ms 22256 KB Output is correct
38 Correct 1 ms 212 KB Output is correct
39 Correct 1 ms 296 KB Output is correct
40 Correct 11 ms 1260 KB Output is correct
41 Correct 201 ms 22276 KB Output is correct
42 Correct 1 ms 212 KB Output is correct
43 Correct 1 ms 300 KB Output is correct
44 Correct 4 ms 596 KB Output is correct
45 Correct 78 ms 8496 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 212 KB Output is correct
49 Correct 45 ms 5836 KB Output is correct
50 Correct 191 ms 22264 KB Output is correct
51 Correct 182 ms 22228 KB Output is correct
52 Correct 180 ms 22432 KB Output is correct
53 Correct 85 ms 12592 KB Output is correct
54 Correct 74 ms 8604 KB Output is correct
55 Correct 165 ms 22316 KB Output is correct
56 Correct 227 ms 22240 KB Output is correct
57 Correct 71 ms 12572 KB Output is correct
58 Correct 0 ms 212 KB Output is correct
59 Correct 1 ms 308 KB Output is correct
60 Correct 1 ms 212 KB Output is correct
61 Correct 56 ms 5896 KB Output is correct
62 Correct 181 ms 22344 KB Output is correct
63 Correct 219 ms 22260 KB Output is correct
64 Correct 185 ms 22348 KB Output is correct
65 Correct 1 ms 212 KB Output is correct
66 Correct 49 ms 5956 KB Output is correct
67 Correct 183 ms 22312 KB Output is correct
68 Correct 223 ms 22320 KB Output is correct
69 Correct 203 ms 22376 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 1 ms 212 KB Output is correct
72 Correct 1 ms 300 KB Output is correct
73 Correct 44 ms 5940 KB Output is correct
74 Correct 183 ms 22336 KB Output is correct
75 Correct 169 ms 22340 KB Output is correct
76 Correct 184 ms 22316 KB Output is correct
77 Correct 170 ms 22272 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 596 KB Output is correct
81 Correct 76 ms 8616 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 212 KB Output is correct
85 Correct 48 ms 5900 KB Output is correct
86 Correct 78 ms 8524 KB Output is correct
87 Correct 67 ms 8600 KB Output is correct
88 Correct 66 ms 8608 KB Output is correct
89 Correct 72 ms 12512 KB Output is correct
90 Correct 1 ms 296 KB Output is correct
91 Correct 1 ms 212 KB Output is correct
92 Correct 7 ms 596 KB Output is correct
93 Correct 82 ms 8660 KB Output is correct
94 Correct 1 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 18 ms 2348 KB Output is correct
98 Correct 73 ms 8500 KB Output is correct
99 Correct 73 ms 8480 KB Output is correct
100 Correct 72 ms 8484 KB Output is correct
101 Correct 81 ms 8544 KB Output is correct
102 Correct 72 ms 8548 KB Output is correct
103 Correct 72 ms 8596 KB Output is correct
104 Correct 69 ms 8580 KB Output is correct
105 Correct 88 ms 8596 KB Output is correct