Submission #991276

#	Time	Username	Problem	Language	Result	Execution time	Memory
991276		abczz	Broken Device (JOI17_broken_device)	C++14	100 / 100	31 ms	2944 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);
  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;
  for (int i=0; i<N; i+=2) {
    ll cur = X % 3;
    if (B[perm[i]] && B[perm[i+1]]) continue;
    else if (B[perm[i]] && (cur == 1 || cur == 2)) continue;
    else if (B[perm[i+1]] && (!cur || cur == 2)) continue;
    X /= 3;
    if (!cur) F[perm[i+1]] = 1;
    else if (cur == 1) F[perm[i]] = 1;
    else F[perm[i]] = F[perm[i+1]] = 1;
    if (!X) break;
  }
  for (int i=0; i<N; ++i) {
    Set(i, F[i]);
  }
}

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);
  ll x = 0, s = 1;
  ll perm[150];
  for (int i=0; i<N; ++i) {
    perm[i] = i;
  }
  shuffle(perm, perm+N, mt);
  for (int i=0; i<N; i+=2) {
    if (A[perm[i]] && A[perm[i+1]]) {
      x += s * 2;
      s *= 3;
    }
    else if (A[perm[i]]) {
      x += s;
      s *= 3;
    }
    else if (A[perm[i+1]]) {
      s *= 3;
    }
  }
  return x;
}

• Subtask 1: 100 / 100