Submission #915389

#	Time	Username	Problem	Language	Result	Execution time	Memory
915389		chirathnirodha	Connecting Supertrees (IOI20_supertrees)	C++17	Compilation error	0 ms	0 KiB

supertrees

#include "supertrees.h"
#include <vector>
using namespace std;
#define F first
#define S sedond
#define PB push_back
#define MP make_pair
#define	P push
#define I insert
typedef long long ll;
typedef long l;
typedef unsigned long long ull;

int uni[1000];
int fin(int x){
	if(uni[x]==x)return x;
	else return fin(uni[x]);
}
void merg(int x,int y){
	x=fin(x);
	y=fin(y);
	if(x<y)uni[y]=x;
	else uni[x]=y;
}
int construct(vector<vector<int>> p) {
	int n = p.size();
	vector<int> answer[n];
	for(int i=0;i<n;i++)for(int j=0;j<n;j++)answer[i].PB(0);
	for(int i=0;i<n;i++)uni[i]=i;
	for(int i=0;i<n;i++)for(int j=0;j<n;j++)if(p[i][j]==3)return 0;
	vector<int> v1[n],v2[n];
	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			if(p[i][j]==1 && fin(i)!=fin(j)){
				answer[i][j]=answer[j][i]=1;
				merg(i,j);
			}
		}
	}
	for(int i=0;i<n;i++)for(int j=i+1;j<n;j++)if(p[i][j]!=1 && fin(i)==fin(j))return 0;
	for(int i=0;i<n;i++){
		int comsiz=1;
		for(int j=i+1;j<n;j++){
			if(p[i][j]==2 && fin(i)!=fin(j)){
				answer[i][j]=answer[j][i]=1;
				merg(i,j);
				comsiz++;
			}
		}
		if(comsiz==2)return 0;
	}
	for(int i=0;i<n;i++)for(int j=i+1;j<n;j++)if(p[i][j]!=1 && fin(i)==fin(j))return 0;
	build(answer);
	return 1;
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:53:8: error: could not convert '(std::vector<int>*)(& answer)' from 'std::vector<int>*' to 'std::vector<std::vector<int> >'
   53 |  build(answer);
      |        ^~~~~~
      |        |
      |        std::vector<int>*