Submission #990975

#	Time	Username	Problem	Language	Result	Execution time	Memory
990975		abczz	Broken Device (JOI17_broken_device)	C++14	49 / 100	38 ms	2656 KiB

Anna

#include "Annalib.h"
#include <iostream>
#include <random>
#include <vector>
#include <algorithm>
#define ll long long

using namespace std;

void Anna( int N, long long X, int K, int P[] ){
  mt19937_64 mt(69);
  ll perm[150];
  for (int i=0; i<N; ++i) {
    perm[i] = i;
  }
  shuffle(perm, perm+N, mt);
  ll x = 805215019090496300;
  bool B[150], F[150];
  for (int i=0; i<N; ++i) B[i] = F[i] = 0;
  for (int i=0; i<K; ++i) B[P[i]] = 1;
  x ^= X;
  ll p = 0;
  for (int i=59; i>=0; --i) {
    ll bit = (bool)(x & (1LL<<i));
    //cout << bit;
    for (; p+1<N; ++p) {
      if (!B[perm[p]] && (!bit || !B[perm[p+1]])) {
        F[perm[p]] = 1;
        F[perm[p+1]] = bit;
        p += 2;
        break;
      }
    }
  }
  //cout << endl;
  for (int i=0; i<N; ++i) {
    //cout << F[perm[i]];
    Set(i, F[i]);
  }
  //cout << X << endl;
  //cout << endl;
}

Bruno

#include "Brunolib.h"
#include <iostream>
#include <vector>
#include <random>
#include <algorithm>
#define ll long long

using namespace std;

long long Bruno( int N, int A[] ){
  mt19937_64 mt(69);
  vector <ll> V;
  ll perm[150], par[150];
  for (int i=0; i<N; ++i) {
    perm[i] = i;
  }
  shuffle(perm, perm+N, mt);
  for (int i=0; i<N; ++i) {
    par[perm[i]] = i;
  }
  //for (int i=0; i<N; ++i) cout << A[perm[i]];
  //cout << endl;
  ll x = 805215019090496300, p = 0;
  int i=59;
  for (; p+1<N; ++p) {
    if (A[perm[p]]) {
      //cout << A[perm[p+1]];
      if (A[perm[p+1]]) x ^= (1LL<<i);
      ++p;
      --i;
    }
  }
  //cout << endl;
  //cout << x << endl;
  return x;
}

Compilation message (stderr)

Bruno.cpp: In function 'long long int Bruno(int, int*)':
Bruno.cpp:13:17: warning: variable 'par' set but not used [-Wunused-but-set-variable]
   13 |   ll perm[150], par[150];
      |                 ^~~

• Subtask 1: 49 / 100