Submission #800475

#	Time	Username	Problem	Language	Result	Execution time	Memory
800475		APROHACK	Connecting Supertrees (IOI20_supertrees)	C++17	21 / 100	227 ms	28096 KiB

supertrees

#include "supertrees.h"
#include <bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
#define pb push_back
using namespace std;
vector<vector<int>>P;
bool vis[1003];
int n;


int construct(std::vector<std::vector<int>> p) {
	n = p.size();
	P = p;
	
	memset(vis, false, sizeof vis);
	vector<std::vector<int>> answer;
	vector<int> row;
	for(int j = 0 ;  j < n ; j ++)row.pb(0);
	for (int i = 0; i < n; i++) {
		answer.push_back(row);
	}
	bool isInG[n+1];
	memset(isInG, false, sizeof isInG);
	for(int i = 0 ; i < n ; i ++){
		if(vis[i])continue;
		set<int>grupo1;
		
		
		for(int j = 0 ; j < n ; j ++){
			if(p[i][j] == 1){
				grupo1.insert(j);
				isInG[j] = true;
			}
		}
		vector<int>g;
		for(auto j :grupo1){
			g.pb(j);
		}
		for(auto j : g){
			for(int x = 0 ; x < n ; x ++){
				if(p[j][x] == 1 and !isInG[x])return 0;
				if(p[j][x] == 0 and isInG[x])return 0;
			}
		}
		for(auto j : g){
			isInG[j] = false;
			vis[j] = true;
		}
		for(int j = 1 ; j < g.size() ; j ++){
			answer[g[j-1]][g[j]] = 1;
			answer[g[j]][g[j-1]] = 1;
		}
	}
	build(answer);
	return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:51:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |   for(int j = 1 ; j < g.size() ; j ++){
      |                   ~~^~~~~~~~~~

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