Submission #1366880

#	Time	Username	Problem	Language	Result	Execution time	Memory
1366880		abgfd324	Data Transfer (IOI19_transfer)	C++20	100 / 100	75 ms	1724 KiB

transfer

#include<iostream>
#include<vector>
using namespace std;
vector<int> get_attachment(vector<int> source)
{
    int x = 0;
    int maxi, maxj;
    vector<int> ans;
    if(source.size() == 63)
    {
        maxi = 6;
        maxj = 63;
    }
    else
    {
        maxi = 8;
        maxj = 255;
    }
    for(int i = 0; i < maxi; i++)
    {
        int cur = 0;
        for(int j = 1; j <= maxj; j++)
        {
            if(((j>>i)&1) == 1)
            {
                cur^=source[j-1];
            }
        }
        x^=cur;
        ans.push_back(cur);
    }
    ans.push_back(x);
    return ans;
}

vector<int> retrieve(vector<int> data)
{
    int x = 0;
    int pr = 0;
    int maxi, maxj;
    if(data.size() == 70)
    {
        maxi = 6;
        maxj = 63;
    }
    else
    {
        maxi = 8;
        maxj = 255;
    }
    for(int i = maxj; i < maxj+maxi; i++) x^=data[i];
    if(data[maxj+maxi] != x)
    {
        for(int i = 0; i < maxi+1; i++) data.pop_back();
        return data;
    }
    else
    {
        for(int i = 0; i < maxi; i++)
        {
            int cur = 0;
            for(int j = 1; j <= maxj; j++)
            {
                if(((j>>i)&1) == 1)
                {
                    cur^=data[j-1];
                }
            }
            if(cur != data[data.size()-maxi-1+i])
            {
                pr|=(1<<i);
            }
        }
        if(pr != 0) data[pr-1]^=1;
        for(int i = 0; i < maxi+1; i++) data.pop_back();
        return data;
    }
}

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