oj.uz

Submission #818913

# Submission time Handle Problem Language Result Execution time Memory
818913 2023-08-10T07:16:32 Z LIF Data Transfer (IOI19_transfer) C++14
100 / 100
 83 ms 2496 KB 
#include "transfer.h"
#include<bits/stdc++.h>
using namespace std;
int n;
vector<int> get_attachment(vector<int> source)
{
	int ans = 0;
	n = source.size();
	int need = 0;
	int mul = 1;
	if(n == 63) need = 6;
	else need = 8;
	//cout<<n<<endl;
	//cout<<need<<endl;
	for(int i=0;i<source.size();i++)if(source[i] == 1)ans ^= (i+1);
	vector<int> temp;
	for(int i=0;i<need;i++)temp.push_back(0);
	int nowbit = 0;
	//cout<<ans<<endl;
	while(ans > 0)
	{
		if(ans %2 == 0)temp[nowbit] = 0;
		else temp[nowbit] = 1;
		nowbit++;
		ans /= 2;
	}
	int kk = 0;
	vector<int> add;
	/*for(int i=temp.size()-1;i>=0;i--)cout<<temp[i]<<" ";
	cout<<endl;*/
	for(int i=temp.size()-1;i>=0;i--)add.push_back(temp[i]);
	for(int i=0;i<add.size();i++)kk ^= add[i];
	add.push_back(kk);
	/*for(int i=0;i<add.size();i++)cout<<add[i]<<" ";
	cout<<endl;*/
	/*for(int i=0;i<source.size();i++)cout<<source[i]<<" ";
	cout<<endl;*/
	return add;
}
vector<int> retrieve(vector<int> data)
{
	/*cout<<data.size()<<endl;
	cout<<"data: ";*/
/*	for(int i=n;i<data.size();i++)cout<<data[i];
	cout<<endl;*/
	int temp = 0;
	int n;
	if(data.size() == 70) n = 63;
	else n = 255;
	for(int i=n;i<data.size()-1;i++)temp ^= data[i];
	if(temp == data[data.size()-1]) // the part of ans1 has been changed.
	{
		int suxor = 0;
		int nowbit = 1;
		for(int i=data.size()-2;i>=n;i--)
		{
			if(data[i] == 1)suxor += nowbit;
			nowbit *= 2;
		}
	//	cout<<suxor<<endl;
		int temp2 = 0;
		for(int i=0;i<n;i++)if(data[i] == 1)temp2 ^= (i+1);
		if(suxor == temp2)
		{
			vector<int> ans;
			ans.clear();
			for(int i=0;i<n;i++)ans.push_back(data[i]);
			return ans;
		}
		else
		{
			int change = (suxor^temp2);
			data[change-1] ^=1;
			vector<int> ans;
			ans.clear();
			for(int i=0;i<n;i++)ans.push_back(data[i]);
			return ans;
		}
	}
	else
	{
		vector<int> ans;
		ans.clear();
		for(int i=0;i<n;i++)ans.push_back(data[i]);
		return ans;
	}
}

Compilation message

transfer.cpp: In function 'std::vector<int> get_attachment(std::vector<int>)':
transfer.cpp:15:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |  for(int i=0;i<source.size();i++)if(source[i] == 1)ans ^= (i+1);
      |              ~^~~~~~~~~~~~~~
transfer.cpp:32:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  for(int i=0;i<add.size();i++)kk ^= add[i];
      |              ~^~~~~~~~~~~
transfer.cpp:10:6: warning: unused variable 'mul' [-Wunused-variable]
   10 |  int mul = 1;
      |      ^~~
transfer.cpp: In function 'std::vector<int> retrieve(std::vector<int>)':
transfer.cpp:50:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |  for(int i=n;i<data.size()-1;i++)temp ^= data[i];
      |              ~^~~~~~~~~~~~~~

Subtask #1
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 640 KB Output is correct
2 Correct 2 ms 640 KB Output is correct
3 Correct 2 ms 648 KB Output is correct
4 Correct 2 ms 640 KB Output is correct
5 Correct 2 ms 640 KB Output is correct
6 Correct 2 ms 648 KB Output is correct
7 Correct 2 ms 720 KB Output is correct
8 Correct 3 ms 648 KB Output is correct
9 Correct 2 ms 640 KB Output is correct
10 Correct 2 ms 732 KB Output is correct
11 Correct 2 ms 640 KB Output is correct
12 Correct 2 ms 640 KB Output is correct
13 Correct 2 ms 640 KB Output is correct
14 Correct 2 ms 728 KB Output is correct
15 Correct 2 ms 648 KB Output is correct
16 Correct 3 ms 640 KB Output is correct
17 Correct 2 ms 640 KB Output is correct

Subtask #2
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 58 ms 2484 KB Output is correct
2 Correct 59 ms 2496 KB Output is correct
3 Correct 70 ms 2492 KB Output is correct
4 Correct 83 ms 2484 KB Output is correct
5 Correct 72 ms 2484 KB Output is correct
6 Correct 70 ms 2484 KB Output is correct
7 Correct 69 ms 2484 KB Output is correct
8 Correct 61 ms 2484 KB Output is correct
9 Correct 59 ms 2484 KB Output is correct
10 Correct 58 ms 2492 KB Output is correct
11 Correct 57 ms 2492 KB Output is correct
12 Correct 58 ms 2484 KB Output is correct
13 Correct 60 ms 2492 KB Output is correct
14 Correct 60 ms 2484 KB Output is correct
15 Correct 63 ms 2480 KB Output is correct
16 Correct 67 ms 2484 KB Output is correct
17 Correct 63 ms 2484 KB Output is correct
18 Correct 60 ms 2484 KB Output is correct
19 Correct 59 ms 2492 KB Output is correct