Submission #777042

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
777042	2023-07-08T14:29:02 Z	YassirSalama	Connecting Supertrees (IOI20_supertrees)	C++14	Compilation error	0 ms	0 KB

supertrees

#include "supertrees.h"
#include <vector>
#include<bits/stdc++.h>
using namespace std;
const int MAXN=1100;
int par[MAXN];
void make_set(){
	for(int i=0;i<MAXN;i++) par[i]=i;
}
int find(int node){
	if(node==par[node]) return node;
	return par[node]=find(par[node]);
}
void merge(int a,int b){
	par[find(a)]=b;
}
int construct(vector<vector<int>> p) {
	int n = p.size();
	vector<vector<int>> answer(n,vector<int>(n,0));
	make_set();
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			if(answer[i][j]) continue;
			if(find(i)==find(j)) {
				// if(p[i][j]==0) return 0;
				answer[i][j]==answer[j][i]=0;
			}
			else{
				if(p[i][j]==0) continue;
				merge(i,j);
				answer[i][j]=answer[j][i]=1;
			}
		}
	}
	//for()
	build(answer);
	return 1;
}

Compilation message

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:26:17: error: lvalue required as left operand of assignment
   26 |     answer[i][j]==answer[j][i]=0;