Submission #1042824

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042824		Unforgettablepl	Tricolor Lights (JOI24_tricolor)	C++17	50 / 100	262 ms	46788 KiB

Anna

#include "Anna.h"
#include <bits/stdc++.h>
using namespace std;

namespace {

string calc(vector<int> arr,string S){
	int N = S.size();
	string res(N,'$');
	for(int i=0;i<N-1;i++){
		if(arr[i])continue;
		{
			vector<bool> present(3);
			if(S[i]=='R')present[0]=true;
			else if(S[i]=='G')present[1]=true;
			else if(S[i]=='B')present[2]=true;
			if(S[i+1]=='R')present[0]=true;
			else if(S[i+1]=='G')present[1]=true;
			else if(S[i+1]=='B')present[2]=true;
			if(!present[0])res[i]=res[i+1]='R';
			else if(!present[1])res[i]=res[i+1]='G';
			else if(!present[2])res[i]=res[i+1]='B';
		}
		for(int j=i-1;j>=0;j--){
			if(arr[j]!=1)break;
			vector<bool> present(3);
			if(S[j]=='R')present[0]=true;
			else if(S[j]=='G')present[1]=true;
			else if(S[j]=='B')present[2]=true;
			if(res[j+1]=='R')present[0]=true;
			else if(res[j+1]=='G')present[1]=true;
			else if(res[j+1]=='B')present[2]=true;
			if(!present[0])res[j]='R';
			else if(!present[1])res[j]='G';
			else if(!present[2])res[j]='B';
		}
		for(int j=i+2;j<N;j++){
			if(arr[j-1]!=1)break;
			vector<bool> present(3);
			if(S[j]=='R')present[0]=true;
			else if(S[j]=='G')present[1]=true;
			else if(S[j]=='B')present[2]=true;
			if(res[j-1]=='R')present[0]=true;
			else if(res[j-1]=='G')present[1]=true;
			else if(res[j-1]=='B')present[2]=true;
			if(!present[0])res[j]='R';
			else if(!present[1])res[j]='G';
			else if(!present[2])res[j]='B';	
		}
	}
	for(int i=0;i<N;i++){
		if(res[i]=='$'){
			if(S[i]=='R')res[i]='B';
			else if(S[i]=='B')res[i]='G';
			else if(S[i]=='G')res[i]='R';
		}
		for(int j=i+1;j<N;j++){
			if(arr[j-1]!=1)break;
			vector<bool> present(3);
			if(S[j]=='R')present[0]=true;
			else if(S[j]=='G')present[1]=true;
			else if(S[j]=='B')present[2]=true;
			if(res[j-1]=='R')present[0]=true;
			else if(res[j-1]=='G')present[1]=true;
			else if(res[j-1]=='B')present[2]=true;
			if(!present[0])res[j]='R';
			else if(!present[1])res[j]='G';
			else if(!present[2])res[j]='B';	
		}
	}
	return res;
}


vector<int> generateDe(int n){
	vector<int> debrujin;
	n--;
	vector<pair<bool,bool>> visited(1<<n);
	function<void(int)> dfs = [&](int x){
		if(!visited[x].first){
			visited[x].first=true;
			dfs((x<<1)&((1<<n)-1));
			debrujin.emplace_back(0);
		}
		if(!visited[x].second){
			visited[x].second=true;
			dfs(((x<<1)&((1<<n)-1))+1);
			debrujin.emplace_back(1);
		}
	};
	dfs(0);
	for(int i=1;i<=n;i++)debrujin.emplace_back(0);
	return debrujin;
}

}

pair<string, int> anna(int N, string S) {
	if(N<=61){
		string res;
		for(int i=0;i<N;i++){
			if(S[i]=='R')res.insert(res.end(),'B');
			else if(S[i]=='B')res.insert(res.end(),'G');
			else if(S[i]=='G')res.insert(res.end(),'R');
		}
		return {res,N};
	}
	auto debrujin = generateDe(18);
	vector<int> res(N+6,2);
	int itr = 0;
	for(int i=0;i<N;i+=3){
		if(debrujin[itr++]==0){
			res[i]=0;
			res[i+1]=1;
		} else {
			res[i-1]=res[i]=res[i+1]=1;
		}
	}
	return {calc(res,S),61};
}

Bruno

#include "Bruno.h"
#include <bits/stdc++.h>
using namespace std;

namespace {

int N;
int l;

vector<int> generateDe(int n){
	vector<int> debrujin;
	n--;
	vector<pair<bool,bool>> visited(1<<n);
	function<void(int)> dfs = [&](int x){
		if(!visited[x].first){
			visited[x].first=true;
			dfs((x<<1)&((1<<n)-1));
			debrujin.emplace_back(0);
		}
		if(!visited[x].second){
			visited[x].second=true;
			dfs(((x<<1)&((1<<n)-1))+1);
			debrujin.emplace_back(1);
		}
	};
	dfs(0);
	for(int i=1;i<=n;i++)debrujin.emplace_back(0);
	return debrujin;
}

vector<int> debrujin;
map<int,int> lookup;

}  // namespace

void init(int N, int l) {
	::N = N;
	::l = l;
	debrujin = generateDe(18);
	for(int i=0;i<N;i++){
		int curr = 0;
		for(int j=0;j<20;j++){
			if(debrujin[i+j])curr|=(1<<j);
		}
		lookup[curr]=i;
	}
}

int bruno(string u) {
	if(N<=61)return 1;
	vector<int> res(l-1);
	for(int i=0;i<l-1;i++)res[i]=u[i]!=u[i+1];
	bool found = false;
	int offset = 0;
	for(int i=0;i<l-2;i++){
		if(res[i])continue;
		if(res[i+1]==0)offset=(i+1)%3;
		else offset = i%3;
		found = true;
		break;
	}
	assert(found);
	vector<int> myseq;
	for(int i=offset;i<l-1;i+=3){
		if(myseq.size()==20)break;
		myseq.emplace_back(res[i]);
	}
	int curr = 0;
	for(int i=0;i<20;i++){
		if(myseq[i])curr|=(1<<i);
	}
	return lookup[curr]*3+1-offset;
	assert(false);
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 15 / 15
• Subtask 5: 19.99998 / 70