Submission #229460

#	Time	Username	Problem	Language	Result	Execution time	Memory
229460		_7_7_	Xoractive (IZhO19_xoractive)	C++14	90 / 100	10 ms	640 KiB

Xoractive

#include "interactive.h"
#include <bits/stdc++.h>                                           
 
//#define int long long
//#pragma GCC optimize("Ofast")
//#pragma comment(linker, "/stack:200000000")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")
 
 
#define file(s) freopen(s".in","r",stdin); freopen(s".out","w",stdout);
#define all(x) x.begin(), x.end()
#define sz(s) (int)s.size()
#define pb push_back
#define ppb pop_back
#define mp make_pair
#define s second
#define f first
 
 
using namespace std;
 
 
typedef pair < long long, long long > pll;    
typedef pair < int, int > pii;
typedef unsigned long long ull;         
typedef vector < pii > vpii;
typedef vector < int > vi;
typedef long double ldb;  
typedef long long ll;  
typedef double db;                             
 
 
const int dx[] = {1, -1, 0, 0}, dy[] = {0, 0, 1, -1}, block = 555;
const int inf = 1e9, maxn = 4e5 + 148, mod = 1e9 + 7, N = 111;
const pii base = mp(1171, 3307), Mod = mp(1e9 + 7, 1e9 + 9);
const db eps = 1e-12, pi = 3.14159265359;
const ll INF = 1e18;




int G[10];
set < int > Q[10];
multiset < int > q;
unordered_map < int, int > was, d;

int Ask (int x) {
	if (was.count(x))
		return was[x];
	return was[x] = ask(x);
}



vi guess(int n) {
	int p = 1;				
	while (p*2 <= n)
		p *= 2;
	--p;
	
	for (int i = 0; i <= 6; ++i) {
		if ((1 << i) > n)
			break;
		int x = p;
		if (!(p & (1 << i))) { 
			for (int j = 1; j <= n; ++j)
				if (j & (1 << i))
					x = j;
		}

		int y = Ask(x); 
		vi cur, cur1;
		for (int j = 1; j <= n; ++j)
			if (j & (1 << i)) {
				cur.pb(j); 
				if (j != x)
					cur1.pb(j);
			}
		
		if (sz(cur) == 1) {
			Q[i].insert(y);
			break;
		}

		q.clear();				
		cur = get_pairwise_xor(cur);
		cur1 = get_pairwise_xor(cur1);
				

		for (auto j : cur)
			q.insert(j);

		for (auto j : cur1)
			q.erase(q.find(j));

		for (auto j : q)
			Q[i].insert(j ^ y);		
	}

/*	for (int i = 0; i < 7; ++i) {
		for (auto j : Q[i]) 
			cerr << j << ' ';
		cerr << "hello\n";
		cerr << endl;	
	}*/

	vi res;
	res.resize(n);	
	
	set < int > QQ;
	for (int i = 0; i < 7; ++i)
		for (auto j : Q[i])
			QQ.insert(j);

	for (auto i : QQ) {
		int jj = 0;
		for (int j = 0; j < 7; ++j) {			
			if (Q[j].count(i))
				jj |= (1 << j);
		} 
		res[jj - 1] = i;
	}

	
	return res;		
}

• Subtask 1: 6 / 6
• Subtask 2: 84 / 94