Submission #261485

#	Time	Username	Problem	Language	Result	Execution time	Memory
261485		arnold518	Broken Device (JOI17_broken_device)	C++14	85 / 100	70 ms	3328 KiB

Anna

#include "Annalib.h"
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
static const int MAXN = 150;
static const int MAXK = 40;
 
static int N, K, *P;
static ll X;
static int A[MAXN+10];

static int PP[160];
static int QQ[160];

static int cnt=1;

void Anna(int _N, ll _X, int _K, int _P[])
{
	N=_N; X=_X; K=_K; P=_P;

	for(int i=0; i<N; i++) PP[i]=i;
	srand(cnt++);
	random_shuffle(PP, PP+N);
	for(int i=0; i<N; i++) QQ[PP[i]]=i;
		
	for(int i=0; i<K; i++) A[QQ[P[i]]]=-1;
 

	ll now=X;
	for(int i=0; i<N; i+=2)
	{
		if(A[i]==-1 || A[i+1]==-1)
		{
			A[i]=0; A[i+1]=0;
		}
		else
		{
			if(now%3==0) A[i]=0, A[i+1]=1;
			else if(now%3==1) A[i]=1, A[i+1]=0;
			else if(now%3==2) A[i]=1, A[i+1]=1;
			now/=3;
		}
	}
	for(int i=0; i<N; i++) Set(PP[i], A[i]);
}

Bruno

#include "Brunolib.h"
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
static int N, *A;

static int PP[160];
static int QQ[160];

static int cnt=1;

ll Bruno(int _N, int _A[])
{
	N=_N; A=_A;
	ll ret=0;

	for(int i=0; i<N; i++) PP[i]=i;
	srand(cnt++);
	random_shuffle(PP, PP+N);
	for(int i=0; i<N; i++) QQ[PP[i]]=i;

	for(int i=N-2; i>=0; i-=2)
	{
		if(A[PP[i]]==0 && A[PP[i+1]]==0) continue;
		if(A[PP[i]]==0 && A[PP[i+1]]==1) ret=ret*3+0;
		if(A[PP[i]]==1 && A[PP[i+1]]==0) ret=ret*3+1;
		if(A[PP[i]]==1 && A[PP[i+1]]==1) ret=ret*3+2;
	}
	return ret;
}

• Subtask 1: 85 / 100