Submission #756324

#	Time	Username	Problem	Language	Result	Execution time	Memory
756324		Trumling	Connecting Supertrees (IOI20_supertrees)	C++14	Compilation error	0 ms	0 KiB

supertrees

bool dfs1(int start,int beg)
{
	vis[start]=1;
	for(int i=0;i<nn;i++)
		if(g[start][i]!=g[beg][i] && i!=start && i!=beg)
			return 0;

	for(int i=0;i<nn;i++)
		if(!vis[i] && g[start][i]==1)
		{
			ans[i][start]=1;
			ans[start][i]=1;
			return dfs1(i,beg);
		}

	vis[beg]=0;

	return 1;
}

bool dfs2(int start,int beg)
{
	vis[start]=1;

	for(int i=0;i<nn;i++)
		if(g[start][i]!=g[beg][i] && i!=start && i!=beg)
			return 0;
		
		

	//ll count=0;
	//for(int i=0;i<nn;i++)
		//if(g[start][i]==2)
		//count++;
	
	//if(count==1)
	//return 0;

	for(int i=0;i<nn;i++)
		if(!vis[i] && g[start][i]==2)
		{
			ans[i][start]=1;
			ans[start][i]=1;

			return dfs2(i,beg);
		}
	ans[start][beg]=1;
	ans[beg][start]=1;
	return 1;
}

int construct(vector<vector<int>> pr) 
{
	nn=pr.size();
	g=pr;

	ans.assign(nn,vector<int>(nn,0));

	for(int i=0;i<nn;i++)
	{
		bool now=dfs1(i,i);
		if(!now)
		return 0;
	}

	for(int i=0;i<nn;i++)
	{
		if(vis[i])
		continue;

		bool now=dfs2(i,i);
		if(!now)
		return 0;
	}

	for(int i=0;i<nn;i++)
	ans[i][i]=0;

	build(ans);
	return 1;

}

Compilation message (stderr)

supertrees.cpp: In function 'bool dfs1(int, int)':
supertrees.cpp:4:2: error: 'vis' was not declared in this scope
    4 |  vis[start]=1;
      |  ^~~
supertrees.cpp:5:16: error: 'nn' was not declared in this scope
    5 |  for(int i=0;i<nn;i++)
      |                ^~
supertrees.cpp:6:6: error: 'g' was not declared in this scope
    6 |   if(g[start][i]!=g[beg][i] && i!=start && i!=beg)
      |      ^
supertrees.cpp:9:16: error: 'nn' was not declared in this scope
    9 |  for(int i=0;i<nn;i++)
      |                ^~
supertrees.cpp:10:17: error: 'g' was not declared in this scope
   10 |   if(!vis[i] && g[start][i]==1)
      |                 ^
supertrees.cpp:12:4: error: 'ans' was not declared in this scope
   12 |    ans[i][start]=1;
      |    ^~~
supertrees.cpp: In function 'bool dfs2(int, int)':
supertrees.cpp:24:2: error: 'vis' was not declared in this scope
   24 |  vis[start]=1;
      |  ^~~
supertrees.cpp:26:16: error: 'nn' was not declared in this scope
   26 |  for(int i=0;i<nn;i++)
      |                ^~
supertrees.cpp:27:6: error: 'g' was not declared in this scope
   27 |   if(g[start][i]!=g[beg][i] && i!=start && i!=beg)
      |      ^
supertrees.cpp:40:16: error: 'nn' was not declared in this scope
   40 |  for(int i=0;i<nn;i++)
      |                ^~
supertrees.cpp:41:17: error: 'g' was not declared in this scope
   41 |   if(!vis[i] && g[start][i]==2)
      |                 ^
supertrees.cpp:43:4: error: 'ans' was not declared in this scope
   43 |    ans[i][start]=1;
      |    ^~~
supertrees.cpp:48:2: error: 'ans' was not declared in this scope
   48 |  ans[start][beg]=1;
      |  ^~~
supertrees.cpp: At global scope:
supertrees.cpp:53:15: error: 'vector' was not declared in this scope
   53 | int construct(vector<vector<int>> pr)
      |               ^~~~~~
supertrees.cpp:53:22: error: 'vector' was not declared in this scope
   53 | int construct(vector<vector<int>> pr)
      |                      ^~~~~~
supertrees.cpp:53:29: error: expected primary-expression before 'int'
   53 | int construct(vector<vector<int>> pr)
      |                             ^~~