Submission #959619

#	Time	Username	Problem	Language	Result	Execution time	Memory
959619		Pring	Xoractive (IZhO19_xoractive)	C++17	100 / 100	5 ms	852 KiB

Xoractive

#include <bits/stdc++.h>
#include "interactive.h"
using namespace std;

#ifdef MIKU
string dbmc = "\033[1;38;2;57;197;187m", dbrs = "\033[0m";
#define debug(x...) cout << dbmc << "[" << #x << "]: ", dout(x)
void dout() { cout << dbrs << endl; }
template <typename T, typename ...U>
void dout(T t, U ...u) { cout << t << (sizeof...(u) ? ", " : ""); dout(u...); }
#else
#define debug(...) 39
#endif

#define fs first
#define sc second
#define mp make_pair
#define FOR(i, j, k) for (int i = j, Z = k; i < Z; i++)
using ll = long long;
typedef pair<int, int> pii;

namespace {
	const int MXN = 105;
	int n;
	vector<int> a;

	vector<int> XOR(vector<int> v) {
		for (auto &i : v) i++;
		return get_pairwise_xor(v);
	}

	multiset<int> GET_MS(vector<int> v) {
		multiset<int> MS;
		set<int> S;
		v.push_back(0);
		vector<int> w = XOR(v);
		for (auto &i : w) MS.insert(i);
		v.pop_back();
		w = XOR(v);
		for (auto &i : w) MS.erase(MS.find(i));
		MS.erase(MS.begin());
		for (auto i : MS) S.insert(i);
		MS.clear();
		for (auto i : S) MS.insert(i);
		return MS;
	}

	vector<int> solve() {
		multiset<int> MS[7];
		set<int> cand;
		a.resize(n);
		a[0] = ask(1);
		int h = __lg(n - 1) + 1;
		FOR(w, 0, h) {
			vector<int> v;
			FOR(i, 1, n) if (i & (1 << w)) v.push_back(i);
			MS[w] = GET_MS(v);
			for (auto j : MS[w]) cand.insert(j);
		}
		auto query = [&](int x) -> int {
			int id = 0;
			FOR(w, 0, h) {
				if (MS[w].find(x) != MS[w].end()) id |= (1 << w);
			}
			return id;
		};
		for (auto i : cand) a[query(i)] = i;
		FOR(i, 1, n) a[i] ^= a[0];
		return a;
	}
}

vector<int> guess(int N) {
	::n = N;
	return solve();
}

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