Submission #431254

#	Time	Username	Problem	Language	Result	Execution time	Memory
431254		Pbezz	Connecting Supertrees (IOI20_supertrees)	C++14	0 / 100	1 ms	204 KiB

supertrees

#include "supertrees.h"
#include <vector>
#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
typedef pair<ll,ll> pii;

const ll MAXN = 2e5+5;
int parent[MAXN],sizee[MAXN];

int find(ll x){
if(x==parent[x])return x;

return parent[x]=find(parent[x]);
}

void unite(ll a, ll b){
a = find(a);
b = find(b);
if(a==b)return;
if(sizee[a]<sizee[b])swap(a,b);

sizee[a]+=sizee[b];
parent[b]=a;
}

int construct(std::vector<std::vector<int>> p) {
	int n = p.size(),i,j,k,a;
	std::vector<std::vector<int>> answer;
	for (i = 0; i < n; i++) {
		std::vector<int> row;
		row.resize(n);
		answer.push_back(row);
	}

	for(i=0;i<n;i++){
	parent[i]=i;
	sizee[i]=1;
	}

	for(i=0;i<n;i++){
	for(j=i+1;j<n;j++){

	if(p[i][j]==0)continue;

	unite(i,j);

	}
}
vector<vector<int>>meh(n);
	for(i=0;i<n;i++){
	k=find(i);
	meh[k].pb(i);
	}//meh[i] e set da componente de i

	for(i=0;i<n;i++){
	if(i!=find(i))continue;
	k = meh[i].size();

	for(j=1;j<k;j++){
	answer[ meh[i][j] ][ meh[i][j-1] ]=1;
	answer[ meh[i][j-1] ][ meh[i][j] ]=1;
	for(a=0;a<k;a++){
	if(p[meh[i][j]][meh[i][a]]==0)return 0;
	}
	}
	answer[ meh[i][k-1] ][ meh[i][0] ]=1;
	answer[ meh[i][0] ][ meh[i][k-1] ]=1;
	for(a=0;a<k;a++){
	if(p[meh[i][0]][meh[i][a]]==0)return 0;
	}

	}



	build(answer);
	return 1;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 10
• Subtask 3: 0 / 19
• Subtask 4: 0 / 35
• Subtask 5: 0 / 21
• Subtask 6: 0 / 4