Submission #1287633

#	Time	Username	Problem	Language	Result	Execution time	Memory
1287633		VMaksimoski008	Data Transfer (IOI19_transfer)	C++20	100 / 100	158 ms	1732 KiB

transfer

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

vector<int> get_attachment(vector<int> source) {
	int n = source.size();
	// cout << "! " << n << endl;
	vector<int> ans;

	int k = (n == 63 ? 6 : 8);
	int X = 0;

	for(int i=0; i<n; i++)
		if(source[i]) X ^= (i+1);

	int cnt = 0;
	for(int i=0; i<k; i++) {
		if(X & (1 << i)) ans.push_back(1), cnt++;
		else ans.push_back(0);
	}

	ans.push_back(cnt & 1);
	// cout << "? " << ans.size() << endl;
	return ans;
}

vector<int> retrieve(vector<int> data) {
	vector<int> ans;
	int n = (data.size() == 70 ? 63 : 255);
	int k = (n == 63 ? 6 : 8);

	// cout << "! " << data.size() << endl;


	int X = 0;
	for(int i=n; i<n+k; i++)
		if(data[i]) X += (1 << (i-n));
	
	if(__builtin_parity(X) != data.back()) {
		for(int i=0; i<n; i++) ans.push_back(data[i]);
		return ans;
	}

	int Y = 0;
	for(int i=0; i<n; i++)
		if(data[i]) Y ^= (i+1);

	for(int i=0; i<n; i++) {
		if((Y ^ (i+1)) == X) {
			data[i] ^= 1;
			break;
		}
	}

	for(int i=0; i<n; i++)
		ans.push_back(data[i]);
	return ans;
}

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