Submission #696264

#	Time	Username	Problem	Language	Result	Execution time	Memory
696264		T0p_	Connecting Supertrees (IOI20_supertrees)	C++14	Compilation error	0 ms	0 KiB

supertrees

// Subtask 2

#include "supertrees.h"
#include <bits/stdc++.h>
using namespace std;

const int N = 1000;

bool visited[N];

int fp(int u) { return pa[u] = (u == pa[u]) ? u : fp(pa[u]); }

int construct(vector<vector<int>> p)
{
	int n = p.size();
	vector<vector<int>> ans(n, vector<int> (n, 0));
	
	for (int i=0 ; i<n ; i++)
	{
		if (visited[i]) continue ;
		visited[i] = true;

		for (int j=0 ; j<i ; j++) if (p[i][j] == 1) return 0;

		for (int j=i, k=i+1 ; k<n ; k++) if (p[i][k] == 1)
		{
			if (visited[k]) return 0;
			visited[k] = true;

			ans[j][k] = ans[j][k] = 1;
			j = k;
		}	
	}

	build(ans);
	return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int fp(int)':
supertrees.cpp:11:24: error: 'pa' was not declared in this scope
   11 | int fp(int u) { return pa[u] = (u == pa[u]) ? u : fp(pa[u]); }
      |                        ^~