Submission #969942

#	Time	Username	Problem	Language	Result	Execution time	Memory
969942		ThegeekKnight16	Xoractive (IZhO19_xoractive)	C++17	88 / 100	4 ms	600 KiB

Xoractive

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

vector<int> intervalXor(int id, vector<int> v, int valId)
{
	// cerr << "v: "; for (auto x : v) cerr << x << " "; cerr << '\n';
	if (v.empty()) return v;
	v.push_back(id);
	vector<int> r1 = get_pairwise_xor(v);
	v.pop_back();
	vector<int> r2 = get_pairwise_xor(v);
	vector<int> resp;
	int id2 = 0;
	for (int i = 0; i < r1.size(); i++)
	{
		if (r2[id2] == r1[i]) {id2++; continue;}
		resp.push_back(r1[i]);
	}
	if (resp[0] == 0) resp.erase(resp.begin());
	vector<int> realResp(1, resp[0]);
	for (int i = 1; i < resp.size(); i++) if (resp[i] != resp[i-1]) realResp.push_back(resp[i]);
	resp = realResp;
	for (auto &x : resp) x ^= valId;
	sort(resp.begin(), resp.end());
	// cerr << "resp: "; for (auto x : resp) cerr << x << " "; cerr << '\n';
	return resp;
}

vector<int> guess(int n) 
{
	// cerr << "BONGA" << '\n';
	vector<int> ans(n);
	ans[0] = ask(1);
	vector<int> ids(n-1); iota(ids.begin(), ids.end(), 2);
	vector<int> nums = intervalXor(1, ids, ans[0]);
	vector<int> pos(n-1);
	for (int k = 6; k >= 0; k--)
	{
		ids.clear();
		for (int i = 2; i <= n; i++) 
			if (i & (1 << k))
				ids.push_back(i);
		vector<int> aux = intervalXor(1, ids, ans[0]);
		if (aux.empty()) continue;
		int idAux = 0;
		for (int i = 0; i < nums.size() && idAux < aux.size(); i++)
		{
			if (aux[idAux] == nums[i]) pos[i] |= (1 << k), idAux++;
		}
	}
	// cerr << "pos: "; for (auto x : pos) cerr << x << " "; cerr << '\n';
	for (int i = 0; i < pos.size(); i++) ans[pos[i]-1] = nums[i];
	// cerr << "n: " << n << ", ans: "; for (auto x : ans) cerr << x << " "; cerr << '\n';
	return ans;
}

Compilation message (stderr)

Xoractive.cpp: In function 'std::vector<int> intervalXor(int, std::vector<int>, int)':
Xoractive.cpp:15:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |  for (int i = 0; i < r1.size(); i++)
      |                  ~~^~~~~~~~~~~
Xoractive.cpp:22:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |  for (int i = 1; i < resp.size(); i++) if (resp[i] != resp[i-1]) realResp.push_back(resp[i]);
      |                  ~~^~~~~~~~~~~~~
Xoractive.cpp: In function 'std::vector<int> guess(int)':
Xoractive.cpp:47:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |   for (int i = 0; i < nums.size() && idAux < aux.size(); i++)
      |                   ~~^~~~~~~~~~~~~
Xoractive.cpp:47:44: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |   for (int i = 0; i < nums.size() && idAux < aux.size(); i++)
      |                                      ~~~~~~^~~~~~~~~~~~
Xoractive.cpp:53:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |  for (int i = 0; i < pos.size(); i++) ans[pos[i]-1] = nums[i];
      |                  ~~^~~~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 82 / 94