Submission #387214

#	Time	Username	Problem	Language	Result	Execution time	Memory
387214		Kalashnikov	Xoractive (IZhO19_xoractive)	C++17	100 / 100	6 ms	396 KiB

Xoractive

#include <bits/stdc++.h>
#include "interactive.h"
 
using namespace std;
#define F first
#define S second

vector<int> guess(int n) {
	vector<int> a(n);
	a[0] = ask(1);
	map<int,int> ans;
	for(int i = 0; (1 << i) <= n; i ++) {
		vector<int> p;
		for(int j = 2; j <= n; j ++) {
			if(j & (1 << i)) {
				p.push_back(j);
			}
		}
		auto g1 = get_pairwise_xor(p);
		p.push_back(1);
		auto g2 = get_pairwise_xor(p);
		map<int,int> mp;
		for(auto to: g2) mp[to] ++;
		for(auto to: g1) mp[to] --;
		for(auto to: mp) {
			if(to.S) {
				ans[to.F^a[0]] |= (1 << i);
			}
		}
	}
	for(auto to: ans) {
		a[to.S-1] = to.F;
	}
	return a;
}

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