Submission #316544

#	Time	Username	Problem	Language	Result	Execution time	Memory
316544		nandonathaniel	Cave (IOI13_cave)	C++14	100 / 100	449 ms	764 KiB

cave

#include "cave.h"
#include "bits/stdc++.h"
using namespace std;
const int MAXN=5005;
int state[MAXN],lampu[MAXN],benar,it;  //saklar ke i 0/1, door ke i saklarnya yang mana
bool sudah[MAXN];
vector<int> belom;

bool valid(){
	int ret=tryCombination(state);
	return ret>it || ret==-1;
}

void DNC(int ki,int ka){
	if(ki==ka){
		//lampu it saklarnya belom[ki]
		lampu[belom[ki]]=it;
		state[belom[ki]]=benar;
		sudah[belom[ki]]=true;
		return;
	}
	int mid=(ki+ka)/2;
	for(int i=ki;i<=mid;i++)state[belom[i]]=1-benar;
	if(valid()){
		for(int i=ki;i<=mid;i++)state[belom[i]]=benar;
		DNC(mid+1,ka);
	}
	else{
		for(int i=ki;i<=mid;i++)state[belom[i]]=benar;
		DNC(ki,mid);
	}
}

void exploreCave(int N) {
    for(it=0;it<N;it++){
    	//try door i
    	belom.clear();
    	for(int j=0;j<N;j++){
    		if(!sudah[j])belom.push_back(j);
		}
		for(auto isi : belom)state[isi]=0;
		if(valid())benar=0;
		else{
			benar=1;
			for(auto isi : belom)state[isi]=1;
		}
		DNC(0,belom.size()-1);
	}
	answer(state,lampu);
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24