Submission #784730

#	Time	Username	Problem	Language	Result	Execution time	Memory
784730		Soumya1	Xoractive (IZhO19_xoractive)	C++17	100 / 100	4 ms	456 KiB

Xoractive

#include "interactive.h"
#include <bits/stdc++.h>
using namespace std;
int a0;
vector<int> get_values(vector<int> v) {
	int has = -1;
	for (int i = 0; i < v.size(); i++) {
		if (v[i] == 1) has = i;
	}
	if (has != -1) v.erase(v.begin() + has);
	auto v1 = get_pairwise_xor(v);
	v.push_back(1);
	auto v2 = get_pairwise_xor(v);
	vector<int> final;
	multiset<int> s;
	for (int i : v2) s.insert(i);
	for (int i : v1) s.erase(s.find(i));
	s.erase(s.find(0));
	set<int> ss;
	for (int i : s) ss.insert(i);
	for (int i : ss) final.push_back(i ^ a0);
	if (has != -1) final.push_back(a0);
	sort(final.begin(), final.end());
	return final;
}
vector<int> guess(int n) {
	a0 = ask(1);
	vector<int> ans(n);
	map<int, int> pos;
	for (int bit = 0; bit < 7; bit++) {
		vector<int> p;
		for (int i = 1; i <= n; i++) {
			if (i >> bit & 1) p.push_back(i);
		}
		if (p.empty()) continue;
		p = get_values(p);
		for (int i : p) pos[i] |= (1 << bit);
	}
	for (auto [x, y] : pos) {
		ans[y - 1] = x;
	}
	return ans;
}

Compilation message (stderr)

Xoractive.cpp: In function 'std::vector<int> get_values(std::vector<int>)':
Xoractive.cpp:7:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |  for (int i = 0; i < v.size(); i++) {
      |                  ~~^~~~~~~~~~

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