Submission #1308870

#	Time	Username	Problem	Language	Result	Execution time	Memory
1308870		thuhienne	Data Transfer (IOI19_transfer)	C++20	100 / 100	223 ms	1728 KiB

transfer

#include "transfer.h"
#include <bits/stdc++.h>

#define re exit(0);

using namespace std;

vector <int> get_attachment(vector <int> source) {
	int n = source.size();
	
	int temp = 0;
	for (int i = 0;i < n;i++) temp = (temp + source[i]) % 2;
	
	vector <int> encode;
	encode.push_back(temp);
	
	for (int bit = 0;bit < __lg(n) + 1;bit++) {
		int sum = 0;
		for (int i = 0;i < n;i++) if ((i + 1) >> bit & 1) {
			sum = (sum + source[i]) % 2;
		}
		encode.push_back(sum);
	}
	
	return encode;
}

vector <int> retrieve(vector <int> data) {
	int n;
	
	if (data.size() == 70) n = 63;
	else n = 255;
	
	vector <int> source;
	for (int i = 0;i < n;i++) source.push_back(data[i]);
	
	//check xem corupt o n hay k
	int oddeven = data[n];
	
	bool corupt = 0;int temp = 0;
	for (int i = 0;i < n;i++) temp = (temp + source[i]) % 2;
	
	//corupt o k
	if (temp == oddeven) return source;
	//corupt o n -> khong corupt o k
	int dick = 0;
	for (int bit = 0;bit < __lg(n) + 1;bit++) {
		int sum = 0;
		for (int i = 0;i < n;i++) if ((i + 1) >> bit & 1) {
			sum = (sum + source[i]) % 2;
		}
		int expected = data[n + 1 + bit];
		if (sum != expected) {
			dick += 1 << bit;
		}
	}
	
	if (dick) source[dick - 1] ^= 1;
	
	return source;
	
}

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