Submission #703946

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
703946	2023-03-01 04:47:19	boyliguanhan	Data Transfer (IOI19_transfer)	C++17	100 / 100	128 ms	2500 KiB

transfer

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#include "transfer.h"
#include <bits/stdc++.h>
#define bit(v) ( v.size() < 99 ? 6 : 8)
using namespace std;
vector<int> convert(int org, int bits) {
  vector<int> res(bits);
  for (int i = 0; i < bits; i++)
    res[i] = (bool)(org & 1 << i);
  return res;
}
int change(vector<int> v) {
  int xored = 0;
  for (int i = 0; i < v.size(); i++)
    if (v[i])
      xored ^= i + 1;
  return xored;
}
int rev(vector<int> v) {
  int n = 0;
  for (int i = 0; i < v.size(); i++)
    n += v[i] << i;
  return n;
}
std::vector<int> get_attachment(std::vector<int> source) {
  vector<int> res = convert(change(source), bit(source));
  res.push_back(count(source.begin(), source.end(), 1) % 2);
  return res;
}
bool corrupt(vector<int> v) {
  return vector<int>(v.end() - bit(v), v.end()) != convert(change(vector<int>(v.begin(), v.end() - bit(v))), bit(v));
 
 
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Compilation message (stderr)

transfer.cpp: In function 'int change(std::vector<int>)':
transfer.cpp:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for (int i = 0; i < v.size(); i++)
      |                  ~~^~~~~~~~~~
transfer.cpp: In function 'int rev(std::vector<int>)':
transfer.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |  for (int i = 0; i < v.size(); i++)
      |                  ~~^~~~~~~~~~

• Subtask 1: 60 / 60
• Subtask 2: 40 / 40