Submission #958366

#	Time	Username	Problem	Language	Result	Execution time	Memory
958366		kilkuwu	Xoractive (IZhO19_xoractive)	C++17	100 / 100	4 ms	596 KiB

Xoractive

#include "interactive.h"
#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL
#include "template\debug.hpp"
#else
#define dbg(...) ;
#define timer(...) ;
#endif

vector<int> guess(int N) {  // ask, getpairwisexor
  std::vector<int> ans(N);
  ans[0] = ask(1);

  std::map<int, int> mp;

  for (int b = 6; b >= 0; b--) {
    std::vector<int> ids;
    for (int i = 1; i < N; i++) {
      if (i >> b & 1) {
        ids.push_back(i + 1);
      }
    }

    if (ids.empty()) continue;
    auto a1 = get_pairwise_xor(ids);
    ids.push_back(1);
    auto a2 = get_pairwise_xor(ids);

    std::map<int, int> ok;
    for (int i : a2) {
      ok[i]++;
    }
    for (int i : a1) {
      ok[i]--;
    }

    ok[0]--;

    dbg(ok);
    for (auto [f, s] : ok) {
      if (s > 0) {
        mp[f ^ ans[0]] ^= 1 << b;
      }
    }
  } 

  dbg(mp);

  for (auto [f, s] : mp) {
    ans[s] = f;
  }

  return ans;
}

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