Submission #1176480

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1176480	2025-03-31 07:05:34	Zero_OP	Data Transfer (IOI19_transfer)	C++20	0 / 100	5 ms	1728 KiB

transfer

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#include "transfer.h"
#include <bits/stdc++.h>
using namespace std;
std::vector<int> get_attachment(std::vector<int> source) {
  int N = (int)source.size();
  vector<int> send = source;
  int b = 0;
  while((1 << b) <= N) ++b;
  vector<int> parity(b);
  for(int i = 0; i < N; ++i) if(source[i] == 0){
    for(int j = 0; j < b; ++j) if((i+1) >> j & 1) parity[j] ^= 1;
  }
  return parity;
}
std::vector<int> retrieve(std::vector<int> data) {
  int L = (int)data.size();
  //L = N + 32 - __builtin_clz(N)
  int N = -1, b = -1;
  for(int i = 1; i < L; ++i){
    int nbit = 0;
    while((1 << nbit) <= i) ++nbit;
    if(i + nbit == L){
      N = i;
 
 
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• Subtask 1: 0 / 60
• Subtask 2: 0 / 40