Submission #1356720

#	Time	Username	Problem	Language	Result	Execution time	Memory
1356720		AMel0n	Data Transfer (IOI19_transfer)	C++20	100 / 100	50 ms	1724 KiB

transfer

#include "transfer.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> get_attachment(vector<int> source) {
    int K = (source.size() <= 63 ? 6 : 8);
    vector<int> res;
    res.push_back(accumulate(source.begin(), source.end(), 0) % 2);
    int xorr = 0;
    for(int i = 0; i < source.size(); i++) {
        if (source[i]) xorr ^= (i+1);
    }
    for(int j = K-1; j >= 0; j--) {
        if (xorr & (1 << j)) res.push_back(1);
        else res.push_back(0);
    }
    return res;
}

vector<int> retrieve(vector<int> data) {
    int K = (data.size() - 7 <= 63 ? 6 : 8);
    int N = data.size() - K - 1;
    int parity = data[N];
    int xorr = 0;
    for(int i = N+1, j = K-1; i < data.size(); i++, j--) {
        if (data[i]) xorr ^= (1 << j);
    }
    vector<int> res;
    int xorr2 = 0;
    for(int i = 0; i < N; i++) {
        res.push_back(data[i]); 
        if (data[i]) xorr2 ^= (i+1);
    }
    if (xorr2 == xorr || parity == accumulate(res.begin(), res.end(), 0) % 2) return res;
    res[(xorr ^ xorr2)-1] ^= 1;
    return res;
}

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