Submission #239448

#	Time	Username	Problem	Language	Result	Execution time	Memory
239448		michao	Cave (IOI13_cave)	C++14	100 / 100	1161 ms	636 KiB

cave

#include <bits/stdc++.h>
#include "cave.h"
#define ll long long int
#define mp make_pair
#define pb push_back
#define ld long double
#define pii pair<int,int>
#define sz(x) (int)x.size()
#define piii pair<pii,pii>
#define precise cout<<fixed<<setprecision(10)
#define st first
#define nd second
#define ins insert
#define vi vector<int>
#define BOOST ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0)
using namespace std;
void exploreCave(int n)
{
	int pom[n],perm[n],arr[n];
	for (int i=0;i<n;i++)arr[i]=-1,perm[i]=-1;
	vi pos;
	int x=0;
	for (int door=0;door<n;door++)
  {
  	pos.clear();
  		for (int i=0;i<n;i++)pom[i]=arr[i];
  	for (int i=0;i<n;i++) if (arr[i]==-1)pos.pb(i);
  	int bit=1;
  	for (int i=0;i<n;i++) if (pom[i]==-1)pom[i]=1;
  	int y=tryCombination(pom);
  	if (y==-1)y=n;
  	if (y<=x)bit^=1;
  	int ile=sz(pos);
  	int ip=-1,ik=sz(pos)-1;
  	while (ip+1<ik)
  	{
  		int mid=(ip+ik)>>1;
  			for (int i=0;i<n;i++)pom[i]=arr[i];
  		for (int i=0;i<=mid;i++) if (pom[pos[i]]==-1)pom[pos[i]]=bit;
  		for (int i=0;i<n;i++) if (pom[i]==-1)pom[i]=(bit^1);
  		y=tryCombination(pom);
  		if (y==-1)y=n;
  		if (y>x)ik=mid;
  		else ip=mid;
  	}
  	ip=pos[ip+1];
  	perm[ip]=door,arr[ip]=bit;
  	x++;
  }
	answer(arr,perm);
}

Compilation message (stderr)

cave.cpp: In function 'void exploreCave(int)':
cave.cpp:33:8: warning: unused variable 'ile' [-Wunused-variable]
    int ile=sz(pos);
        ^~~

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