Submission #1132247

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1132247	2025-01-05 01:54:12	totoro	Data Transfer (IOI19_transfer)	C++20	0 / 100	5 ms	1724 KiB

transfer

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#include "transfer.h"
#include <vector>
#include <iostream>
#include <cassert>
std::vector<int> get_attachment(std::vector<int> source) {
  std::vector<int> res;
  for (int i = 0; (1 << i) < source.size(); ++i) {
    int xorsum = 0;
    for (int j = 0; j < source.size(); ++j) {
      if (((j >> i) & 1) == 0) continue;
      xorsum ^= source[j];
    }
    res.push_back(xorsum);
  }
  int parity = 0;
  for (int i : res) parity ^= i;
  res.push_back(parity);
  return res;
}
int log2(int n) {
  int log = 0;
  while (n) ++log, n >>= 1;
  return log;
}
std::vector<int> retrieve(std::vector<int> data) {
  int parity = data.back(); data.pop_back();
  int extra = log2(data.size());
 
 
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• Subtask 1: 0 / 60
• Subtask 2: 0 / 40