Submission #120406

#	Time	Username	Problem	Language	Result	Execution time	Memory
120406		nxteru	Cave (IOI13_cave)	C++14	100 / 100	477 ms	640 KiB

cave

#include "cave.h"
#include <bits/stdc++.h>
using namespace std;
#define PB push_back
int n,ans[5005],k,s[5005];
void exploreCave(int N) {
	n=N;
	for(int i=0;i<n;i++)ans[i]=-1;
	while(1){
		vector<int>x;
		for(int i=0;i<n;i++)if(ans[i]==-1)x.PB(i);
		if(x.size()==0)break;
		int p=tryCombination(s);
		if(p==-1||p>k)p=1;
		else p=0;
		while(x.size()>1){
			for(int i=0;i<x.size()/2;i++)s[x[i]]^=1;
			int q=tryCombination(s);
			if(q==-1||q>k)q=1;
			else q=0;
			vector<int>y;
			if(p==q)for(int i=x.size()/2;i<x.size();i++)y.PB(x[i]);
			else for(int i=0;i<x.size()/2;i++)y.PB(x[i]);
			x.clear();
			for(int i=0;i<y.size();i++)x.PB(y[i]);
			p=q;
		}
		ans[x[0]]=k++;
		if(p==0)s[x[0]]^=1;
	}
	answer(s,ans);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:17:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<x.size()/2;i++)s[x[i]]^=1;
                ~^~~~~~~~~~~
cave.cpp:22:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(p==q)for(int i=x.size()/2;i<x.size();i++)y.PB(x[i]);
                                 ~^~~~~~~~~
cave.cpp:23:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    else for(int i=0;i<x.size()/2;i++)y.PB(x[i]);
                     ~^~~~~~~~~~~
cave.cpp:25:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int i=0;i<y.size();i++)x.PB(y[i]);
                ~^~~~~~~~~

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