Submission #257521

#	Time	Username	Problem	Language	Result	Execution time	Memory
257521		BThero	Xoractive (IZhO19_xoractive)	C++17	100 / 100	6 ms	512 KiB

Xoractive

// chrono::system_clock::now().time_since_epoch().count()
#include<bits/stdc++.h>
#include "interactive.h"

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define debug(x) cerr << #x << " = " << x << endl;

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;

int n;
vi arr;

void print(vi x) {
  fprintf(stderr, "%d:", x.size());
  
  for (int y : x) {
    fprintf(stderr, " %d", y);
  }
  
  fprintf(stderr, "\n");
}

int query(int x) {
  return ask(x + 1);
}

vi query(vi x) {
  for (int &y : x) {
    ++y;
  }
  
  return get_pairwise_xor(x);
}

vi guess(int _n) {
  n = _n;
  arr = vi(n, 0);
  arr[0] = query(0);
  map<int, int> idx;
  
  for (int i = 0; (1 << i) < n; ++i) {
    vi A;
    
    for (int j = 1; j < n; ++j) {
      if ((j >> i) & 1) {
        A.pb(j);
      }
    }
    
    vi B = query(A);
    A.pb(0);
    vi C = query(A);
    map<int, int> cnt;
    
    for (int x : B) {
      --cnt[x];
    }
    
    for (int x : C) {
      ++cnt[x];
    }
    
    for (auto it : cnt) {
      if (it.fi != 0 && it.se > 0) {
        idx[it.fi ^ arr[0]] += (1 << i);
      }
    }
  }
  
  for (auto it : idx) {
    arr[it.se] = it.fi;
  }
  
  return arr;
}

Compilation message (stderr)

Xoractive.cpp: In function 'void print(vi)':
Xoractive.cpp:24:34: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
   fprintf(stderr, "%d:", x.size());
                          ~~~~~~~~^

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