Submission #399103

#	Time	Username	Problem	Language	Result	Execution time	Memory
399103		iulia13	Xoractive (IZhO19_xoractive)	C++14	100 / 100	6 ms	456 KiB

Xoractive

#include <iostream>
#include <map>
#include <vector>
#include <algorithm>
#include "interactive.h"
using namespace std;
map <int, int> mp;/*
vector <int> a;
int n;
int ask(int position) {
    return a[position - 1];

}
vector<int> get_pairwise_xor(vector<int> positions) {
    vector<int> pairwise_xor;

    for (int i = 0; i < positions.size(); i++) {
        for (int j = 0; j < positions.size(); j++) {
            pairwise_xor.push_back(a[positions[i] - 1] ^ a[positions[j] - 1]);
        }
    }
    sort(pairwise_xor.begin(), pairwise_xor.end());

    return pairwise_xor;
}*/
vector <int> guess(int n)
{
    vector <int> v;
    v.resize(n);
    v[0] = ask(1);
    for (int i = 0; (1 << i) <= n; i++)
    {
        vector <int> poz;
        vector <int> poz1;
        vector <int> poz2;
        int cnt = 0, n1, n2;
        for (int j = 2; j <= n; j++)
            if (j & (1 << i))
                poz.push_back(j), cnt++;
        poz1 = get_pairwise_xor(poz);
        poz1.resize(cnt * cnt);
        n1 = cnt * cnt;
        poz.push_back(1);
        poz2 = get_pairwise_xor(poz);
        n2 = (cnt + 1) * (cnt + 1);
        poz2.resize(n2);
        map <int, int> mpp;
        for (auto x : poz2)
            mpp[x]++;
        for (auto x : poz1)
            mpp[x]--;
        for (auto x : mpp)
            if (x.second)
                mp[x.first ^v[0]] |= (1 << i);
    }
    for (auto x : mp)
        v[x.second - 1] = x.first;
    return v;
}/*
int main()
{
    cin >> n;
    for (int i = 1; i <= n; i++) {
        int x;
        cin >> x;

        a.push_back(x);
    }
    a.resize(n);
    vector<int> participant_solution = guess(n);
    participant_solution.resize(n);
    for (int i = 0; i < n; i++)
        cout << participant_solution[i] << " ";
    return 0;
}*/

Compilation message (stderr)

Xoractive.cpp: In function 'std::vector<int> guess(int)':
Xoractive.cpp:36:22: warning: variable 'n1' set but not used [-Wunused-but-set-variable]
   36 |         int cnt = 0, n1, n2;
      |                      ^~

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