Submission #1034327

#	Time	Username	Problem	Language	Result	Execution time	Memory
1034327		vjudge1	cmp (balkan11_cmp)	C++17	0 / 100	426 ms	82512 KiB

cmp

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

#define all(x) x.begin(), x.end()

const int N = 4096;

mt19937 rng(time(nullptr) + 69);

void remember(int a) {
  int x = __builtin_popcount(a);
  if (x <= 1 + 12-x) {
    for (int i = 0; i <= 11; i++) {
      if ((a >> i) & 1) bit_set(i+1);
    }
  }
  else {
    bit_set(13);
    for (int i = 0; i <= 11; i++) {
      if (!((a >> i) & 1)) bit_set(i+1);
    }
  }
}

int compare(int b) {
  vector<int> bt(12);
  for (int i = 0; i < 12; i++) {
    bt[i] = i;
  }
  shuffle(all(bt), rng);

  int inv = bit_get(13);

  int mask = 0;
  for (int i = 0; i < 11; i++) {
    int x = bit_get(bt[i]+1);
    if (inv) x = !x;

    if (x) mask ^= (1 << bt[i]);
  }

  if (mask > b) return -1;
  else if (mask == b) return 0;
  else return 1;
}

• Subtask 1: 0 / 100