Submission #69967

#	Time	Username	Problem	Language	Result	Execution time	Memory
69967		WA_TLE	Parachute rings (IOI12_rings)	C++14	37 / 100	1502 ms	94636 KiB

rings

#include<deque>
#include<queue>
#include<vector>
#include<algorithm>
#include<iostream>
#include<set>
#include<cmath>
#include<tuple>
#include<string>
#include<chrono>
#include<functional>
#include<iterator>
#include<random>
#include<unordered_set>
#include<array>
#include<map>
#include<iomanip>
#include<assert.h>
#include<bitset>
#include<stack>
#include<memory>
using namespace std;
typedef long long int llint;
typedef long double lldo;
#define mp make_pair
#define mt make_tuple
#define pub push_back
#define puf push_front
#define pob pop_back
#define pof pop_front
#define fir first
#define sec second
#define res resize
#define ins insert
#define era erase
/*
cout<<setprecision(20);
cin.tie(0);
ios::sync_with_stdio(false);
*/
const llint mod=1000000000;
const llint big=2.19e15+1;
const long double pai=3.141592653589793238462643383279502884197;
const long double eps=1e-15;
template <class T,class U>bool mineq(T& a,U b){if(a>b){a=b;return true;}return false;}
template <class T,class U>bool maxeq(T& a,U b){if(a<b){a=b;return true;}return false;}
llint gcd(llint a,llint b){if(a%b==0){return b;}else return gcd(b,a%b);}
llint lcm(llint a,llint b){if(a==0){return b;}return a/gcd(a,b)*b;}
template<class T> void SO(T& ve){sort(ve.begin(),ve.end());}
template<class T> void REV(T& ve){reverse(ve.begin(),ve.end());}
template<class T>llint LBI(vector<T>&ar,T in){return lower_bound(ar.begin(),ar.end(),in)-ar.begin();}
template<class T>llint UBI(vector<T>&ar,T in){return upper_bound(ar.begin(),ar.end(),in)-ar.begin();}

vector<vector<int>>len;
vector<int>cri;//Tじの候補
vector<int>uni[4];
vector<int>ran[4];
int rop[4]={0};//その状態でのループ数
int geans;
int Taru=0;
void Init(int n){
	len.res(n);
	geans=n;
	cri.pub(0x869120);cri.pub(-1);cri.pub(-1);cri.pub(-1);
	for(int j=0;j<4;j++){
		ran[j].res(n);uni[j].res(n);
		for(int i=0;i<n;i++){ran[j][i]=1;uni[j][i]=i;}
	}
}
int en=-1;
int sta;
vector<int>dfit;
vector<int>hai;
vector<pair<int,int>>queri;
bool unfi(int A,int B,int bas){
	if(cri[bas]==A||cri[bas]==B){return false;}
	int a=A,b=B;
	while(a!=uni[bas][a]){a=uni[bas][a];}
	while(b!=uni[bas][b]){b=uni[bas][b];}
	if(ran[bas][a]<ran[bas][b]){swap(a,b);}
	uni[bas][b]=a;
	if(a==b){rop[bas]++;}
	else{ran[bas][a]+=ran[bas][b];}
	return (a==b);
}
void reki(int bas){
	for(int i=0;i<len.size();i++){uni[bas][i]=i;ran[bas][i]=1;}
	for(auto it:queri){unfi(it.fir,it.sec,bas);}
}
void Link(int A,int B){
	
	len[A].pub(B);
	len[B].pub(A);
	if(Taru){
		if(len[A].size()==3){
			for(auto &it:cri){
				if(it!=A&&it!=len[A][0]&&it!=len[A][1]&&it!=len[A][2]){it=-1;}
			}
		}
		if(len[A].size()>3){
			for(auto &it:cri){if(it!=A){it=-1;}}
		}
	}else if(len[A].size()==3){
		Taru=1;
		cri.clear();
		cri.pub(A);reki(0);
		cri.pub(len[A][0]);reki(1);
		cri.pub(len[A][1]);reki(2);
		cri.pub(len[A][2]);reki(3);
	}
	if(Taru){
		if(len[B].size()==3){
			for(auto &it:cri){
				if(it!=B&&it!=len[B][0]&&it!=len[B][1]&&it!=len[B][2]){it=-1;}
			}
		}
		if(len[B].size()>3){
			for(auto &it:cri){if(it!=B){it=-1;}}
		}
	}else if(len[B].size()==3){
		Taru=1;
		cri.clear();
		cri.pub(B);reki(0);//構築する
		cri.pub(len[B][0]);reki(1);
		cri.pub(len[B][1]);reki(2);
		cri.pub(len[B][2]);reki(3);
	}
	queri.pub(mp(A,B));
	if(Taru){geans=0;}
	for(int j=0;j<4;j++){
		if(cri[j]==-1){continue;}
		bool ret=unfi(A,B,j);
		if((!Taru)&&ret&&rop[j]==1){
			int a=A;
			while(a!=uni[j][a]){a=uni[j][a];}
			geans=ran[j][a];
		}
		if((!Taru)&&rop[j]==2){geans=0;}
		if(Taru&&rop[j]>0){cri[j]=-1;}
		if(Taru&&rop[j]==0){geans++;}
	}
}
int CountCritical(void){return geans;}

Compilation message (stderr)

rings.cpp: In function 'void reki(int)':
rings.cpp:87:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<len.size();i++){uni[bas][i]=i;ran[bas][i]=1;}
              ~^~~~~~~~~~~

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