Submission #7003

#	Time	Username	Problem	Language	Result	Execution time	Memory
7003		gs13068	Cave (IOI13_cave)	C++98	100 / 100	1661 ms	608 KiB

cave

#include "cave.h"

int S[5000];
int D[5000];
int V[5000];

void exploreCave(int N)
{
	int l,r,m;
	int i,j,k;
    for(i=0;i<N;i++)V[i]=0;
    for(i=0;i<N;i++)
	{
		for(j=0;j<N;j++)if(!V[j])S[j]=0;
		j=tryCombination(S);
		if(j<0)j=N;
        if(j>i)k=0;
        else k=1;

		l=0;r=N-1;
		while(l<r)
		{
			m=(l+r)/2;
            for(j=0;j<N;j++)if(!V[j])
            {
            	if(j>=l&&j<=m)S[j]=k;
            	else S[j]=!k;
            }
            j=tryCombination(S);
            if(j<0)j=N;
            if(j>i)r=m;
            else l=m+1;
		}
		S[l]=k;
		D[l]=i;
		V[l]=1;
	}
	answer(S,D);
}

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