Submission #1308924

#	Time	Username	Problem	Language	Result	Execution time	Memory
1308924		thnhann	Data Transfer (IOI19_transfer)	C++20	100 / 100	60 ms	1728 KiB

transfer

#include <bits/stdc++.h>
using namespace std;
vector<int> get_attachment(vector<int> a) {
    int n = a.size();
    int sum = 0, par = 0;
    for(int i = 0; i < n; i++) {
        if(a[i] == 1) {
            sum ^= (i + 1);
            par ^= 1;
        }
    }
    int k = (n == 63 ? 6 : 8);
    vector<int> ans;
    for(int i = 0; i < k; i++) ans.push_back((sum >> i) & 1);
    ans.push_back(par);
    return ans;
}
vector<int> retrieve(vector<int> data) {
    int len = data.size();
    int n = (len <= 72 ? 63 : 255);
    int k = (n == 63 ? 6 : 8);
    vector<int> b;
    int cur_sum = 0, cur_par = 0;
    for(int i = 0; i < n; i++) {
        b.push_back(data[i]);
        if(data[i] == 1) {
            cur_sum ^= (i + 1);
            cur_par ^= 1;
        }
    }
    int att_sum = 0;
    for(int i = 0; i < k; i++) if(data[n + i] == 1) att_sum |= (1 << i);
    int att_par = data[n + k];
    int s = cur_sum ^ att_sum;
    int check = cur_par ^ att_par;
    if(check == 1 && s != 0) {
        if(s - 1 < n) b[s - 1] ^= 1;
    }

    return b;
}

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