Submission #958075

#	Time	Username	Problem	Language	Result	Execution time	Memory
958075		I_am_Polish_Girl	Xoractive (IZhO19_xoractive)	C++14	100 / 100	4 ms	600 KiB

Xoractive

#include "interactive.h"
 
#include <iostream>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <stack>
#include <queue>
#include <cmath>
#include <random>
#include <chrono>
 
using namespace std;
 
//#define int long long
 
int log_ = 10;
int inf = 1000000000000000000;
int mod = 998244353;
 
 
 
vector<int> guess(int n)
{
    vector <int> ans(n);
  
  if (n < 15)
{
    for (int i = 0 ; i < n ; i++)
    {
        ans[i] = ask(i+1);
    }
 
 
    return ans;
}
  
    ans[0] = ask(1);
 
    map <int, int> nums_;
 
    for (int i = 0; i <= 6; i++)
    {
        vector <int> ind;
 
 
        for (int j = 1; j < n; j++)
        {
            if ((j & (1 << i)) != 0)
            {
                ind.push_back(j+1);
            }
        }
 
        vector <int> ans1 = get_pairwise_xor(ind);
        ind.push_back(1);
 
        vector <int> ans2 = get_pairwise_xor(ind);
 
        map <int, int> nums;
 
        for (int i = 0; i < ans2.size(); i++)
        {
            nums[ans2[i]]++;
        }
 
        for (int i = 0; i < ans1.size(); i++)
        {
            nums[ans1[i]]--;
        }
 
 
        for (auto i_ : nums)
        {
            if (i_.second != 0)
            {
                nums_[i_.first ^ ans[0]] += (1 << i);
            }
        }
    }
 
 
 
    for (int i = 1; i < n; i++)
    {
        for (auto j : nums_)
        {
            if (j.second == i)
                ans[i] = j.first;
        }
    }
 
 
    return ans;
};

Compilation message (stderr)

Xoractive.cpp:21:11: warning: overflow in conversion from 'long int' to 'int' changes value from '1000000000000000000' to '-1486618624' [-Woverflow]
   21 | int inf = 1000000000000000000;
      |           ^~~~~~~~~~~~~~~~~~~
Xoractive.cpp: In function 'std::vector<int> guess(int)':
Xoractive.cpp:65:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         for (int i = 0; i < ans2.size(); i++)
      |                         ~~^~~~~~~~~~~~~
Xoractive.cpp:70:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |         for (int i = 0; i < ans1.size(); i++)
      |                         ~~^~~~~~~~~~~~~

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