Submission #1308834

#	Time	Username	Problem	Language	Result	Execution time	Memory
1308834		EthanKim8683	Data Transfer (IOI19_transfer)	C++20	100 / 100	32 ms	1732 KiB

transfer

#include <vector>

std::vector<int> get_attachment(std::vector<int> source);
std::vector<int> retrieve(std::vector<int> data);

#include <bits/stdc++.h>

// #include "transfer.h"

using namespace std;

vector<int> get_attachment(vector<int> source) {
  int k = source.size() == 63 ? 7 : 9;

  int sum = 0;
  for (int i = 0; i < source.size(); i++) {
    if (source[i] == 1) {
      sum ^= i + 1;
    }
  }

  vector<int> rv;
  for (int i = 0; i < k - 1; i++) {
    rv.push_back(sum >> i & 1);
  }
  rv.push_back(__builtin_popcount(sum) % 2);

  return rv;
}

vector<int> retrieve(vector<int> data) {
  int k = data.size() == 63 + 7 ? 7 : 9;

  vector<int> rv(data.begin(), data.end() - k);

  int sum = 0;
  for (int i = 0; i < k - 1; i++) {
    sum |= data[data.size() - k + i] << i;
  }
  if (__builtin_popcount(sum) % 2 != data.back()) return rv;

  for (int i = 0; i < data.size() - k; i++) {
    if (data[i] == 1) {
      sum ^= i + 1;
    }
  }
  if (sum == 0) return rv;

  rv[sum - 1] ^= 1;
  return rv;
}

Compilation message (stderr)

grader.cpp: In instantiation of 'void shuffle(std::vector<T>&) [with T = Scenario]':
grader.cpp:200:10:   required from here
grader.cpp:28:23: warning: 'void std::random_shuffle(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<Scenario*, vector<Scenario> >]' is deprecated: use 'std::shuffle' instead [-Wdeprecated-declarations]
   28 |         random_shuffle(v.begin(), v.end());
      |         ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/algorithm:61,
                 from grader.cpp:8:
/usr/include/c++/13/bits/stl_algo.h:4581:5: note: declared here
 4581 |     random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last)
      |     ^~~~~~~~~~~~~~

• Subtask 1: 60 / 60
• Subtask 2: 40 / 40