Submission #367391

#	Time	Username	Problem	Language	Result	Execution time	Memory
367391		fishy15	Xoractive (IZhO19_xoractive)	C++14	0 / 100	150 ms	620 KiB

Xoractive

#include <iostream>
#include <iomanip>
#include <fstream>
#include <vector>
#include <array>
#include <algorithm>
#include <utility>
#include <map>
#include <queue>
#include <set>
#include <cmath>
#include <cstdio>
#include <cstring>

#include "interactive.h"

#define ll long long
#define ld long double
#define eps 1e-8
#define MOD 1000000007

#define INF 0x3f3f3f3f
#define INFLL 0x3f3f3f3f3f3f3f3f

// change if necessary
#define MAXN 1000000

using namespace std;

vector<int> guess(int n) {
    int zero = ask(1);
    vector<vector<vector<int>>> vals(7, vector<vector<int>>(2));
    for (int i = 1; i < n; i++) {
        for (int j = 0; j < 7; j++) {
            vals[j][(i >> j) & 1].push_back(i + 1);
        }
    }

    for (int i = 0; i < 7; i++) {
        for (int j = 0; j <= 1; j++) {
            if (!vals[i][j].empty()) {
                vals[i][j].push_back(1);
                auto v = get_pairwise_xor(vals[i][j]);
                sort(v.begin(), v.end());
                v.erase(v.begin(), upper_bound(v.begin(), v.end(), 0));
                vals[i][j] = v;
            }
        }
    }

    vector<int> ans(n);
    ans[0] = zero;
    for (int i = 1; i < n; i++) {
        map<int, int> cnt;
        for (int j = 0; j < 7; j++) {
            for (int x : vals[j][(i >> j) & 1]) {
                cnt[x ^ zero]++;
            }
        }
        pair<int, int> m;
        for (auto p : cnt) {
            m = max(m, {p.second, p.first});
        }
        ans[i] = m.second;
    }

    return ans;
}

• Subtask 1: 0 / 6
• Subtask 2: 0 / 94