Submission #838567

#	Time	Username	Problem	Language	Result	Execution time	Memory
838567		SoulKnight	Connecting Supertrees (IOI20_supertrees)	C++17	21 / 100	169 ms	24064 KiB

supertrees

#include "supertrees.h"
#include <vector>
#include <iostream>
#include <algorithm>
#include <map>
#include <numeric>
using namespace std;

#define ll long long
#define ln '\n'

const int N = 1000 + 5;

int par[N];
int find(int u){return ((u == par[u])? u: par[u]=find(par[u]));}

map<int, vector<int>> mp;

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

	iota(par, par+n, 0);

	for (int i = 0; i < n; i++){
		for (int j = i+1; j < n; j++){
			if (p[i][j]) par[find(i)] = find(j);
		}
	}

	for (int i = 0; i < n; i++){
		for (int j = i+1; j < n; j++){
			if (!p[i][j] && find(i) == find(j)) return 0;
		}
	}

	for (int i = 0; i < n; i++){
		mp[find(i)].push_back(i);
	}

	for (auto& [p, v]: mp){
		for (auto& u: v){
			if (u != p) answer[u][p] = answer[p][u] = 1;
		}
	}


	build(answer);
	return 1;
}

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