Submission #26405

#	Time	Username	Problem	Language	Result	Execution time	Memory
26405		zscoder	Question (Grader is different from the original contest) (CEOI14_question_grader)	C++14	100 / 100	1668 ms	27480 KiB

encoder

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
using namespace __gnu_pbds;
 
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fbo find_by_order
#define ook order_of_key
 
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<ll> vi;
typedef long double ld; 
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<ll>::iterator sit;
typedef map<ll,ll>::iterator mit;

const int C = 12;
vector<int> vec;

static void gen()
{
	int s = (1 << 6) - 1;
	while (!(s & 1 << 12))
	{
		// do stuff with s
		vec.pb(s);
		int lo = s & ~(s - 1);       // lowest one bit
		int lz = (s + lo) & ~s;      // lowest zero bit above lo
		s |= lz;                     // add lz to the set
		s &= ~(lz - 1);              // reset bits below lz
		s |= (lz / lo / 2) - 1;      // put back right number of bits at end
	}
}

int encode (int n, int x, int y) 
{
	if(vec.empty()) gen();
	int s1 = vec[x]; int s2 = vec[y];
	for(int i = 0; i < C; i++)
	{
		if((s1&(1<<i)) && !(s2&(1<<i))) return i+1;
	}
	return -1;
}

decoder

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
using namespace __gnu_pbds;
 
#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define fbo find_by_order
#define ook order_of_key
 
typedef long long ll;
typedef pair<ll,ll> ii;
typedef vector<ll> vi;
typedef long double ld; 
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<ll>::iterator sit;
typedef map<ll,ll>::iterator mit;

const int C = 12;
vector<int> vec2;

static void gen()
{
	int s = (1 << 6) - 1;
	while (!(s & 1 << 12))
	{
		// do stuff with s
		vec2.pb(s);
		int lo = s & ~(s - 1);       // lowest one bit
		int lz = (s + lo) & ~s;      // lowest zero bit above lo
		s |= lz;                     // add lz to the set
		s &= ~(lz - 1);              // reset bits below lz
		s |= (lz / lo / 2) - 1;      // put back right number of bits at end
	}
}

int decode (int n, int q, int h) 
{
	if(vec2.empty()) gen();
	h--;
	int tmp = vec2[q];
	if(tmp&(1<<h)) return 1;
	else return 0;
}

• Subtask 1: 100 / 100