Submission #853943

#	Time	Username	Problem	Language	Result	Execution time	Memory
853943		Trisanu_Das	Xoractive (IZhO19_xoractive)	C++17	100 / 100	4 ms	596 KiB

Xoractive

#include <bits/stdc++.h>
#include "interactive.h"
using namespace std;
#define ff first
#define ss 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 x: g2) mp[x]++;
		for(auto x: g1) mp[x]--;
		for(auto x: mp) if(x.ss) ans[x.ff ^ a[0]] |= (1 << i);
	}
	for(auto x: ans) a[x.ss - 1] = x.ff;
	return a;
}

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