Submission #909772

#	Time	Username	Problem	Language	Result	Execution time	Memory
909772		BBart888	Data Transfer (IOI19_transfer)	C++14	0 / 100	8 ms	4612 KiB

transfer

#include <cstdio>
#include <iostream>
#include <vector>
#include <list>
#include <string>
#include <set>
#include <map>
#include <algorithm>
#include <fstream>
#include <cmath>
#include <queue>
#include <stack>
#include <cassert>
#include <cstring>
#include <climits>
#include <functional>
#include <cstdlib>
#include <complex>
#include <array>
#include <iomanip>
#include <bitset>
#define fileIO(name) if(fopen(name".in", "r")) {freopen(name".in", "r", stdin); freopen(name".out", "w", stdout);}



using namespace std;
const int MAXN = 2e5 + 111;
using ll = long long;
const int P = 31;
const ll mod1 = 1e9 + 7;
const ll mod2 = 998244353;
using ld = long double;
const ld EPS = 1e-5;
using pii = pair<int, int>;
const int K = 300;



vector<int> get_attachment(vector<int> source)
{
	vector<int> res = source;
	int x = 0;

	for (int i = 0; i < source.size(); i++)
	{
		if (source[i])
			x ^= (1 + i);
	}
	int odd = 0;
	if (source.size() <= 63)
	{
		for (int i = 0; i < 6; i++)
		{
			if ((1 << i) & x)
				odd++,res.push_back(1);
			else
				res.push_back(0);
		}
		res.push_back(odd & 1);
	}
	else
	{
		for (int i = 0; i < 8; i++)
			if ((1 << i) & x)
				odd++, res.push_back(1);
			else
				res.push_back(0);
		res.push_back(odd & 1);
	}

	return res;
}


vector<int> retrieve(vector<int> data)
{
	

	if (data.size() <= 63 + 7)
	{
		int par = data.back();
		data.pop_back();
		int x = 0;
		int odd = 0;
		for (int i = data.size()-6; i < data.size(); i++)
		{
			if (data[i])
				odd++,x ^= (1 << (i-data.size()+6));
		}
		for (int i = 0; i < 6; i++)
			data.pop_back();
		if (par != odd)
			return data;
		int now = 0;
		for (int i = 0; i < data.size(); i++)
			if (data[i])
				now ^= (i + 1);

		int error = now ^ x;

		data[error - 1] = 1 - data[error - 1];
	}
	else
	{
		int par = data.back();
		data.pop_back();
		int x = 0;
		int odd = 0;
		for (int i = data.size() - 8; i < data.size(); i++)
			if (data[i])
				odd++, x ^= (1 << (i-data.size()+8));
		for (int i = 0; i < 8; i++)
			data.pop_back();
		if (par != odd)
			return data;
	
		int now = 0;
		for (int i = 0; i < data.size(); i++)
			if (data[i])
				now ^= (i + 1);
		int error = now ^ x;
		
		data[error - 1] = 1 - data[error - 1];
	}

	



	return data;
}

Compilation message (stderr)

transfer.cpp: In function 'std::vector<int> get_attachment(std::vector<int>)':
transfer.cpp:44:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |  for (int i = 0; i < source.size(); i++)
      |                  ~~^~~~~~~~~~~~~~~
transfer.cpp: In function 'std::vector<int> retrieve(std::vector<int>)':
transfer.cpp:85:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |   for (int i = data.size()-6; i < data.size(); i++)
      |                               ~~^~~~~~~~~~~~~
transfer.cpp:95:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |   for (int i = 0; i < data.size(); i++)
      |                   ~~^~~~~~~~~~~~~
transfer.cpp:109:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |   for (int i = data.size() - 8; i < data.size(); i++)
      |                                 ~~^~~~~~~~~~~~~
transfer.cpp:118:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |   for (int i = 0; i < data.size(); i++)
      |                   ~~^~~~~~~~~~~~~

• Subtask 1: 0 / 60
• Subtask 2: 0 / 40