제출 #1170800

#제출 시각아이디문제언어결과실행 시간메모리
1170800fesdrerShuffle (NOI19_shuffle)C++17
36 / 100
1 ms328 KiB
#include "shuffle.h"
#include <bits/stdc++.h>
using namespace std;
namespace Solve1{
	int to[5][1005];
	void get(vector<vector<int>> rlt,int id){
		for(vector<int> i:rlt)	to[id][i[0]]=i[1],to[id][i[1]]=i[0];
	}
	vector<int> solve1(int n){
		vector<vector<int>> tmp(0);
		for(int i=1;i<=n;i+=2)	tmp.push_back({i,i+1});
		vector<vector<int>> rlt=shuffle(tmp);
		get(rlt,1);
		tmp.clear();
		for(int i=2;i<n;i+=2)	tmp.push_back({i,i+1});
		tmp.push_back({n,1});
		rlt=shuffle(tmp);
		get(rlt,2);
		tmp.clear(),tmp.push_back({1,3}),tmp.push_back({2,4});
		for(int i=5;i<=n;i+=2)	tmp.push_back({i,i+1});
		rlt=shuffle(tmp);
		get(rlt,3);
		tmp.clear(),tmp.push_back({2,4}),tmp.push_back({3,5});
		for(int i=6;i<n;i+=2)	tmp.push_back({i,i+1});
		tmp.push_back({n,1});
		rlt=shuffle(tmp);
		get(rlt,4);
		vector<int> ret(0);
		int st=0;
		for(int i=1;i<=n;i++)	if(to[3][i]!=to[1][i]&&to[4][i]==to[2][i]){
			st=i;ret.push_back(i);break;
		}
		st=to[1][st],ret.push_back(st);
		for(int i=2;i<=n/2;i++){
			st=to[2][st],ret.push_back(st);
			st=to[1][st],ret.push_back(st);
		}
		return ret;
	}
}
namespace Solve2{
	int tag[1005];
	int lazy1[1005],lazy2[1005],rnk[10000];
	pair<int,int> find(vector<vector<int>> x,vector<vector<int>> y){
		for(int i:x[0])	tag[i]++;
		for(int i:y[0])	tag[i]+=2;
		int cnt3=0;
		for(int i=1;i<=1000;i++)	if(tag[i]==3)	cnt3++;
		if(cnt3==int(x[0].size())-1){
			pair<int,int> ret={0,0};
			for(int i=1;i<=1000;i++)	if(tag[i]==2)	ret.first=i;
			for(int i=1;i<=1000;i++)	tag[i]=0;
			for(int i:x[1])	tag[i]++;
			for(int i:y[1])	tag[i]+=2;
			for(int i=1;i<=1000;i++)	if(tag[i]==2)	ret.second=i;
			for(int i=1;i<=1000;i++)	tag[i]=0;
			return ret;
		}
		else{
			for(int i=1;i<=1000;i++)	tag[i]=0;
			pair<int,int> ret={0,0};
			for(int i:x[0])	tag[i]++;
			for(int i:y[1])	tag[i]+=2;
			for(int i=1;i<=1000;i++)	if(tag[i]==2)	ret.first=i;
			for(int i=1;i<=1000;i++)	tag[i]=0;
			for(int i:x[1])	tag[i]++;
			for(int i:y[0])	tag[i]+=2;
			for(int i=1;i<=1000;i++)	if(tag[i]==2)	ret.second=i;
			for(int i=1;i<=1000;i++)	tag[i]=0;
			return ret;
		}
	}
	void getlazy(vector<vector<int>> ori,vector<vector<int>> tun,int val,int bit){
		bool flag=0;
		for(int i:ori[0])	if(i==1)	flag=1;
		if(flag)	for(int i:ori[0])	lazy1[i]+=bit;
		else	for(int i:ori[1])	lazy1[i]+=bit;
		flag=0;
		for(int i:tun[0])	if(i==val)	flag=1;
		if(flag)	for(int i:tun[0])	lazy2[i]+=bit;
		else	for(int i:tun[1])	lazy2[i]+=bit;
	}
	vector<int> solve2(int n){
		int len=n/2;
		vector<vector<int>> tmp(2,vector<int>(0));
		for(int i=1;i<=len;i++)	tmp[0].push_back(i);
		for(int i=len+1;i<=n;i++)	tmp[1].push_back(i);
		vector<vector<int>> rlt1=shuffle(tmp);
		tmp[0].clear(),tmp[1].clear();
		tmp[0].push_back(len+1),tmp[1].push_back(1);
		for(int i=2;i<=len;i++)	tmp[0].push_back(i);
		for(int i=len+2;i<=n;i++)	tmp[1].push_back(i);
		vector<vector<int>> rlt2=shuffle(tmp);
		tmp[0].clear(),tmp[1].clear();
		tmp[0].push_back(n),tmp[1].push_back(1);
		for(int i=2;i<=len;i++)	tmp[0].push_back(i);
		for(int i=len+1;i<n;i++)	tmp[1].push_back(i);
		vector<vector<int>> rlt3=shuffle(tmp);
		pair<int,int> dif1=find(rlt1,rlt2),dif2=find(rlt1,rlt3);
		int val=0;
		if(dif1.first==dif2.first)	val=dif1.first;
		else if(dif1.first==dif2.second)	val=dif1.first;
		else if(dif1.second==dif2.first)	val=dif1.second;
		else if(dif1.second==dif2.second)	val=dif1.second;
		tmp[0].clear(),tmp[1].clear();
		for(int i=1;i<=len;i++)	tmp[0].push_back(i);
		for(int i=len+1;i<=n;i++)	tmp[1].push_back(i);
		getlazy(tmp,rlt1,val,1);
		for(int bit=1;bit<=len;bit<<=1){
			tmp[0].clear(),tmp[1].clear();
			for(int i=1;i<=len;i++){
				if(i&bit)	tmp[0].push_back(i),tmp[1].push_back(i+len);
				else	tmp[1].push_back(i),tmp[0].push_back(i+len);
			}
			vector<vector<int>> rltnow=shuffle(tmp);
			getlazy(tmp,rltnow,val,bit<<1);
		}
		for(int i=1;i<=n;i++)	rnk[lazy2[i]]=i;
		vector<int> ret(0);
		for(int i=1;i<=n;i++)	ret.push_back(rnk[lazy1[i]]);
		return ret;
	}
}
vector<int> solve(int N, int B, int K, int Q, int ST) {
	if(K==2)	return Solve1::solve1(N);
	if(B==2)	return Solve2::solve2(N);
}

컴파일 시 표준 에러 (stderr) 메시지

shuffle.cpp: In function 'std::vector<int> solve(int, int, int, int, int)':
shuffle.cpp:127:1: warning: control reaches end of non-void function [-Wreturn-type]
  127 | }
      | ^
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