oj.uz

Submission #300512

# Submission time Handle Problem Language Result Execution time Memory
300512 2020-09-17T08:25:00 Z nandonathaniel Connecting Supertrees (IOI20_supertrees) C++14
30 / 100
 269 ms 24036 KB 
#include "supertrees.h"
#include "bits/stdc++.h"
using namespace std;
typedef pair<int,int> pii;
const int MAXN=1005;

int par[MAXN];
bool idx[MAXN];
vector<int> kel[MAXN];

int find(int x){
	if(par[x]==x)return par[x];
	return par[x]=find(par[x]);
}

void join(int a,int b){
	int ortua=find(a),ortub=find(b);
	par[ortua]=ortub;
}

int construct(vector<vector<int>> p){
	vector<pii> nol;
	vector<vector<int>> ans;
	int n = p.size();
	for(int i=0;i<n;i++)par[i]=i;
	ans.resize(n);
	for(int i=0;i<n;i++){
		ans[i].resize(n);
		for(int j=0;j<n;j++){
			ans[i][j]=0;
			if(i==j)continue;
			if(p[i][j])join(i,j);
			else if(i<j)nol.push_back({i,j});
		}
	}
	for(auto isi : nol){
		if(find(isi.first)==find(isi.second))return 0;
	}
	for(int i=0;i<n;i++)kel[find(i)].push_back(i);
	for(int i=0;i<n;i++){
		if(kel[i].size()<=1)continue;
		vector<int> satu,dua;
		for(int j=0;j<kel[i].size();j++){
			bool ada=false;
			for(int k=0;k<kel[i].size();k++){
				if(j==k)continue;
				if(p[kel[i][j]][kel[i][k]]==1){
					satu.push_back(kel[i][k]);
					ada=true;
				}
			}
			if(ada){
				satu.push_back(kel[i][j]);
				break;
			}
		}
		for(int i=0;i<satu.size();i++){
			idx[satu[i]]=true;
			for(int j=0;j<satu.size();j++){
				if(i==j)continue;
				if(p[i][j]!=1)return 0;
			}
		}
		for(auto isi : kel[i]){
			if(!idx[isi])dua.push_back(isi);
		}
		if(!satu.empty()){
			dua.push_back(satu.back());
			satu.pop_back();
		}
		if(dua.size()==2)return 0;
		for(int i=0;i<(int)dua.size()-1;i++){
			ans[dua[i]][dua[i+1]]=1;
			ans[dua[i+1]][dua[i]]=1;
		}
		if(!dua.empty() && dua.size()>1){
			ans[dua[0]][dua.back()]=1;
			ans[dua.back()][dua[0]]=1;
		}
		if(!satu.empty() && !dua.empty()){
			ans[dua.back()][satu[0]]=1;
			ans[satu[0]][dua.back()]=1;
		}
		for(int i=0;i<(int)satu.size()-1;i++){
			ans[satu[i]][satu[i+1]]=1;
			ans[satu[i+1]][satu[i]]=1;
		}
	}
	build(ans);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:43:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |   for(int j=0;j<kel[i].size();j++){
      |               ~^~~~~~~~~~~~~~
supertrees.cpp:45:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |    for(int k=0;k<kel[i].size();k++){
      |                ~^~~~~~~~~~~~~~
supertrees.cpp:57:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |   for(int i=0;i<satu.size();i++){
      |               ~^~~~~~~~~~~~
supertrees.cpp:59:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |    for(int j=0;j<satu.size();j++){
      |                ~^~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 11 ms 1280 KB Output is correct
7 Correct 258 ms 22264 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 11 ms 1280 KB Output is correct
7 Correct 258 ms 22264 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 11 ms 1368 KB Output is correct
13 Correct 263 ms 24036 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 6 ms 896 KB Output is correct
17 Correct 129 ms 14184 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Incorrect 34 ms 4460 KB Answer gives possible 0 while actual possible 1
21 Halted 0 ms 0 KB -

Subtask #3
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 11 ms 1368 KB Output is correct
9 Correct 268 ms 24036 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 11 ms 1280 KB Output is correct
13 Correct 269 ms 22136 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 7 ms 896 KB Output is correct
17 Correct 129 ms 14184 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 70 ms 6252 KB Output is correct
22 Correct 261 ms 23652 KB Output is correct
23 Correct 256 ms 24036 KB Output is correct
24 Correct 263 ms 22192 KB Output is correct
25 Correct 123 ms 16100 KB Output is correct
26 Correct 124 ms 15844 KB Output is correct
27 Correct 254 ms 24036 KB Output is correct
28 Correct 264 ms 22116 KB Output is correct
29 Correct 124 ms 16100 KB Output is correct

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Answer gives possible 0 while actual possible 1
4 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 11 ms 1280 KB Output is correct
7 Correct 258 ms 22264 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 11 ms 1368 KB Output is correct
13 Correct 263 ms 24036 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 6 ms 896 KB Output is correct
17 Correct 129 ms 14184 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Incorrect 34 ms 4460 KB Answer gives possible 0 while actual possible 1
21 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 1 ms 512 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 11 ms 1280 KB Output is correct
7 Correct 258 ms 22264 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 512 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 11 ms 1368 KB Output is correct
13 Correct 263 ms 24036 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 6 ms 896 KB Output is correct
17 Correct 129 ms 14184 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Incorrect 34 ms 4460 KB Answer gives possible 0 while actual possible 1
21 Halted 0 ms 0 KB -