제출 #116587

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
116587		faustaadp	낙하산 고리들 (IOI12_rings)	C++17	20 / 100	4093 ms	175952 KiB

rings

#include<bits/stdc++.h>
typedef long long ll;
#define pb push_back
#define mp make_pair
#define fi first
#define se second
using namespace std;
ll n,isi[1010101],D[1010101],i,j,CC;
vector<ll> v[1010101];
vector<ll> w[1010101];
ll br[1010101],tot;
ll mi[1010101];
ll b[1010101];
ll p[1010101];
ll nw[1010101],te,Z,has;
void Init(int N_) {
  n = N_;
  CC=n;
  isi[0]=n;
  for(i=1;i<=n;i++)p[i]=i;
  memset(b,-1,sizeof(b));
  memset(br,-1,sizeof(br));
}
ll car(ll aa)
{
	if(p[aa]==aa)
		return aa;
	else 
		return p[aa]=car(p[aa]);
}
void dfs(ll aa,ll bb)
{
	te++;
	nw[aa]=te;
	mi[aa]=te;
	b[aa]=Z;
	ll ii;
	for(ii=0;ii<v[aa].size();ii++)
	{
		if(v[aa][ii]==bb)continue;
		if(b[v[aa][ii]]!=Z)
		{
			dfs(v[aa][ii],aa);
			mi[aa]=min(mi[aa],mi[v[aa][ii]]);
		}
		else
			mi[aa]=min(mi[aa],nw[v[aa][ii]]);
		if(mi[v[aa][ii]]>nw[aa])
			br[w[aa][ii]]=Z;
	}
}
void Link(int A, int B) 
{
	Z++;
	v[A].pb(B);
	w[A].pb(Z);
	v[B].pb(A);
	w[B].pb(Z);
	if(p[car(A)]!=car(B))
	{
		p[car(A)]=car(B);
		CC--;
	}
	D[A]++;
	D[B]++;
	isi[D[A]]++;
	isi[D[B]]++;
	isi[D[A]-1]--;
	isi[D[B]-1]--;
	tot+=2;
}
int CountCritical() 
{	
	has=0;
	te=0;
	for(i=0;i<n;i++)
		if(b[i]!=Z)
			dfs(i,i);
	for(i=0;i<n;i++)
	{
		ll CCC=CC,ada=1;
		isi[D[i]]--;
		for(j=0;j<v[i].size();j++)
		{
			if(br[w[i][j]]==Z)
			{
			//	cout<<i<<" "<<v[i][j]<<"_\n";
				CCC++;
			}
			else
				ada=0;
			isi[D[v[i][j]]]--;
			isi[D[v[i][j]]-1]++;
		}
		if(ada||D[i]==0)
			CCC--;
		has+=(((isi[0]+isi[1]+isi[2])==n-1)&&(((n-1)*2-CCC*2)==(tot-D[i]*2)));
		isi[D[i]]++;
		for(j=0;j<v[i].size();j++)
		{
			isi[D[v[i][j]]]++;
			isi[D[v[i][j]]-1]--;
		}
	}
	return has;
}

컴파일 시 표준 에러 (stderr) 메시지

rings.cpp: In function 'void dfs(ll, ll)':
rings.cpp:38:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(ii=0;ii<v[aa].size();ii++)
           ~~^~~~~~~~~~~~~
rings.cpp: In function 'int CountCritical()':
rings.cpp:83:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<v[i].size();j++)
           ~^~~~~~~~~~~~
rings.cpp:99:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(j=0;j<v[i].size();j++)
           ~^~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 0 / 17
• Subtask 3: 0 / 18
• Subtask 4: 0 / 14
• Subtask 5: 0 / 31