Submission #1363456

#	Time	Username	Problem	Language	Result	Execution time	Memory
1363456		solution6312	Data Transfer (IOI19_transfer)	C++17	40 / 100	48 ms	1724 KiB

transfer

#include "transfer.h"
#include <iostream>
#include <vector>
#include <cassert>
using namespace std;

vector<int> get_attachment(vector<int> A)
{
    assert(A.size()==255);
    int res=0;
    for (int i=1; i<=255; i++) if (A[i-1]) res^=i;
    int cnt=(__builtin_popcount(res)&1);
    vector<int> ans;
    for (int i=0; i<8; i++) ans.push_back((res>>i)&1);
    ans.push_back(cnt);
    return ans;
}

vector<int> retrieve(vector<int> B)
{
    assert(B.size()==264);
    int res=0, cnt=0;
    for (int i=0; i<8; i++) if (B[255+i]) res^=(1<<i);
    cnt=B[263];
    if ((__builtin_popcount(res)&1)==cnt)
    {
        int cur=0;
        for (int i=1; i<=255; i++) if (B[i-1]) cur^=i;
        cur^=res;
        if (cur) B[cur-1]^=1;
    }
    vector<int> ans;
    for (int i=0; i<255; i++) ans.push_back(B[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: 0 / 60
• Subtask 2: 40 / 40