Submission #94317

#	Time	Username	Problem	Language	Result	Execution time	Memory
94317		fjzzq2002	Cave (IOI13_cave)	C++14	100 / 100	757 ms	640 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;
#define tryy tryCombination
void exploreCave(int N)
{
	vector<int> v;
	int o1[5005],o2[5005],t[5005],x1[5005],x2[5005];
	for(int i=0;i<N;++i)
		v.push_back(i),t[i]=0;
	for(int i=0;i<N;++i)
	{
		if(tryy(t)==i)
			for(auto x:v) t[x]^=1;
		int l=1,r=v.size();
		while(l<r)
		{
			int m=(l+r)>>1;
			for(int j=0;j<m;++j) t[v[j]]^=1;
			if(tryy(t)==i) r=m; else l=m+1;
			for(int j=0;j<m;++j) t[v[j]]^=1;
		}
		--l; o1[i]=v[l]; o2[i]=!t[o1[i]];
		v.erase(v.begin()+l);
	}
	if(tryy(t)!=-1) throw "GG";
	for(int i=0;i<N;++i)
		x1[o1[i]]=i,x2[o1[i]]=!o2[i];
	answer(x2,x1);
}

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