oj.uz

Submission #483489

# Submission time Handle Problem Language Result Execution time Memory
483489 2021-10-29T22:56:49 Z rc_catunta Connecting Supertrees (IOI20_supertrees) C++14
21 / 100
 247 ms 24060 KB 
#include "supertrees.h"
#include <vector>
#include <iostream>
#include <unordered_map>
using namespace std;

vector<int> rep,rnk;

void init(int N){
	rep.assign(N,0);
	for(int i=0;i<N;i++){
		rep[i]=i;
	}
	rnk.assign(N,1);
}

int buscar(int a){
	if(rep[a]==a) return a;
	return rep[a]=buscar(rep[a]);
}

bool mismo_conjunto(int a,int b){
	return buscar(a)==buscar(b);
}

void unir(int a,int b){
	int ra=buscar(a);
	int rb=buscar(b);
	if(ra != rb){
		if(rnk[ra]>rnk[rb]){
			rep[rb]=ra;
		}
		else{
			rep[ra]=rb;
		}
	}
}

int construct(vector<vector<int> > p) {
	int n = p.size();
	vector<vector<int> > answer;
	answer.assign(n,vector<int>(n));
	// Creamos el Union Find
	init(n);
	// Recorremos p
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			if(p[i][j]==1){
				unir(i,j);
			}
		}
	}
	// Verificar si p es correcto, si existe un grafo que lo satisfaga
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			if(mismo_conjunto(i,j) and p[i][j]==0){
				return 0;
			}
		}
	}
	// Si p es valido
	unordered_map<int,vector<int> >conjuntos;
	for(int i=0;i<rep.size();i++){
		int ri = buscar(i);
		if(conjuntos.find(ri)!=conjuntos.end()){
			conjuntos[ri].push_back(i);
		}
		else{
			conjuntos[ri] = vector<int>();
			conjuntos[ri].push_back(i);
		}
	}
	for(auto elem: conjuntos){
		vector<int> cont = elem.second;
		for(int i=0;i<cont.size()-1;i++){
			int na = cont[i];
			int nb = cont[i+1];
			answer[na][nb]=1;
			answer[nb][na]=1;
		}
	}
	// Imprimiendo
	/* for(auto elem: conjuntos){
		int llave = elem.first;
		vector<int> cont = elem.second;
		cout<<llave<<": ";
		for(auto x: cont){
			cout<<x<<" ";
		}
		cout<<endl;
	}*/
	build(answer);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:63:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |  for(int i=0;i<rep.size();i++){
      |              ~^~~~~~~~~~~
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 i=0;i<cont.size()-1;i++){
      |               ~^~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 9 ms 1216 KB Output is correct
7 Correct 183 ms 24008 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 9 ms 1216 KB Output is correct
7 Correct 183 ms 24008 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 288 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 8 ms 1228 KB Output is correct
13 Correct 171 ms 24044 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 5 ms 844 KB Output is correct
17 Correct 85 ms 14060 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 45 ms 6260 KB Output is correct
21 Correct 176 ms 23932 KB Output is correct
22 Correct 171 ms 23928 KB Output is correct
23 Correct 202 ms 24004 KB Output is correct
24 Correct 189 ms 24060 KB Output is correct
25 Correct 74 ms 14072 KB Output is correct
26 Correct 72 ms 14068 KB Output is correct
27 Correct 247 ms 24060 KB Output is correct
28 Correct 171 ms 24052 KB Output is correct

Subtask #3
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Incorrect 1 ms 204 KB Answer gives possible 1 while actual possible 0
5 Halted 0 ms 0 KB -

Subtask #4
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Incorrect 0 ms 204 KB Too few ways to get from 0 to 1, should be 2 found 0
3 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 9 ms 1216 KB Output is correct
7 Correct 183 ms 24008 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 288 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 8 ms 1228 KB Output is correct
13 Correct 171 ms 24044 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 5 ms 844 KB Output is correct
17 Correct 85 ms 14060 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 45 ms 6260 KB Output is correct
21 Correct 176 ms 23932 KB Output is correct
22 Correct 171 ms 23928 KB Output is correct
23 Correct 202 ms 24004 KB Output is correct
24 Correct 189 ms 24060 KB Output is correct
25 Correct 74 ms 14072 KB Output is correct
26 Correct 72 ms 14068 KB Output is correct
27 Correct 247 ms 24060 KB Output is correct
28 Correct 171 ms 24052 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Incorrect 1 ms 204 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -

Subtask #6
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 9 ms 1216 KB Output is correct
7 Correct 183 ms 24008 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 288 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 8 ms 1228 KB Output is correct
13 Correct 171 ms 24044 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 204 KB Output is correct
16 Correct 5 ms 844 KB Output is correct
17 Correct 85 ms 14060 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 45 ms 6260 KB Output is correct
21 Correct 176 ms 23932 KB Output is correct
22 Correct 171 ms 23928 KB Output is correct
23 Correct 202 ms 24004 KB Output is correct
24 Correct 189 ms 24060 KB Output is correct
25 Correct 74 ms 14072 KB Output is correct
26 Correct 72 ms 14068 KB Output is correct
27 Correct 247 ms 24060 KB Output is correct
28 Correct 171 ms 24052 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Incorrect 1 ms 204 KB Answer gives possible 1 while actual possible 0
33 Halted 0 ms 0 KB -