oj.uz

Submission #300703

# Submission time Handle Problem Language Result Execution time Memory
300703 2020-09-17T12:19:34 Z nandonathaniel Connecting Supertrees (IOI20_supertrees) C++14
19 / 100
 278 ms 24164 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],kelkecil[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;
		for(int j=0;j<n;j++){
			kelkecil[j].clear();
			par[j]=j;
			idx[j]=false;
		}
		for(auto isi : kel[i]){
			for(auto isi2 : kel[i]){
				if(p[isi][isi2]==1)join(isi,isi2);
			}
		}
		for(auto isi : kel[i])kelkecil[find(isi)].push_back(isi);
		vector<vector<int>> satu;
		vector<int> dua;
		for(int j=0;j<n;j++){
			if(kelkecil[j].size()<=1)continue;
			satu.push_back(kelkecil[j]);
		}
		for(auto isi : satu){
			for(auto isi2 : isi)idx[isi2]=true;
		}
		for(auto isi : kel[i]){
			if(!idx[isi])dua.push_back(isi);
		}
		vector<int> cycle;
		for(auto isi : dua)cycle.push_back(isi);
		for(auto isi : satu)cycle.push_back(isi.back());
		if(cycle.size()<3)return 0;
		for(auto isi : satu){
			for(int j=0;j<isi.size()-1;j++){
				ans[isi[j]][isi[j+1]]=1;
				ans[isi[j+1]][isi[j]]=1;
			}
		}
		for(int j=0;j<cycle.size();j++){
			ans[cycle[j]][cycle[(j+1)%cycle.size()]]=1;
			ans[cycle[(j+1)%cycle.size()]][cycle[j]]=1;
		}
	}
	build(ans);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:70:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |    for(int j=0;j<isi.size()-1;j++){
      |                ~^~~~~~~~~~~~~
supertrees.cpp:75:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   75 |   for(int j=0;j<cycle.size();j++){
      |               ~^~~~~~~~~~~~~

Subtask #1
0 / 11.0

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

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Incorrect 1 ms 384 KB Answer gives possible 0 while actual possible 1
3 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 512 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 11 ms 1368 KB Output is correct
9 Correct 265 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 265 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 6 ms 1024 KB Output is correct
17 Correct 135 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 68 ms 6260 KB Output is correct
22 Correct 262 ms 23648 KB Output is correct
23 Correct 265 ms 24164 KB Output is correct
24 Correct 278 ms 22380 KB Output is correct
25 Correct 122 ms 16104 KB Output is correct
26 Correct 125 ms 15716 KB Output is correct
27 Correct 269 ms 24036 KB Output is correct
28 Correct 271 ms 22316 KB Output is correct
29 Correct 121 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 0 ms 384 KB Output is correct
2 Incorrect 1 ms 384 KB Answer gives possible 0 while actual possible 1
3 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

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