Submission #1078458

#	Time	Username	Problem	Language	Result	Execution time	Memory
1078458		anton	Broken Device (JOI17_broken_device)	C++17	85 / 100	27 ms	3112 KiB

Anna

#include "Annalib.h"
#include<bits/stdc++.h>

using namespace std;
#define ll long long 

int N;
ll X;


void Anna( int _N, long long _X, int K, int P[] ){
  ll XOR = 2233426368436346LL;

  N = _N;
  X = _X;

  vector<int> base3;
  X = X^XOR;
  while(X>0){
    base3.push_back(X%3LL);
    X/=3LL;
  }


  vector<bool> broken(N, false);
  for(int i = 0; i<K; i++){
    broken[P[i]] = true;
  }

  vector<int> res(N);
  auto mySet = [&](int pos, int val){
    if(pos<N){
      res[pos] = val;
    }
  };

  vector<int> info_bits;
  for(auto e: base3){
    if(e==0){
      info_bits.push_back(0);
      info_bits.push_back(1);
    }
    else if(e==1){
      info_bits.push_back(1);
      info_bits.push_back(0);
    }
    else if(e==2){
      info_bits.push_back(1);
      info_bits.push_back(1);
    }
  }
  /*for(auto e: info_bits){
    cout<<e<<" ";
  }
  cout<<endl;*/

  int cur_pos = 0;
  int cur_bit =0;
  while(cur_pos<N && cur_bit<info_bits.size()){
    if(!info_bits[cur_bit] || !broken[cur_pos]){
      if(!info_bits[cur_bit+1] || !broken[cur_pos+1]){
        res[cur_pos] =info_bits[cur_bit];
        res[cur_pos+1] = info_bits[cur_bit+1];
        cur_bit+=2;
      }
    }
    cur_pos+=2;
  }

  

  for(int i = 0; i<N; i++){
    Set(i, res[i]);
 
  }
  

}

Bruno

#include "Brunolib.h"
#include<bits/stdc++.h>

using namespace std;
#define ll long long 

long long Bruno( int N, int A[] ){
  ll XOR = 2233426368436346LL;

  vector<ll> bits;
  for(int i = 0; i<N; i+=2){
    if(A[i]>0 || A[i+1]>0){
      bits.push_back(A[i]);
      bits.push_back(A[i+1]);
    }
  }
  ll res= 0;

  /*for(auto e: bits){
    cout<<e<<" ";
  }
  cout<<endl;*/
  vector<int> base3;


  for(int i = 0; i<bits.size(); i+=2){
    if(bits[i] == 0 && bits[i+1] == 0){
    
    }
    else{
      if(bits[i] == 0 && bits[i+1] == 1){
        base3.push_back(0);
      }
      if(bits[i] == 1&& bits[i+1] == 0){
        base3.push_back(1);
      }
      if(bits[i] == 1 && bits[i+1] == 1){
        base3.push_back(2);
      }
    }
  }

  ll X= 0;

  while(base3.size()>0){
    X*=3LL;
    X += (ll)(base3.back());
    base3.pop_back();
  }
  X = X^XOR;
  return X;

}

Compilation message (stderr)

Anna.cpp: In function 'void Anna(int, long long int, int, int*)':
Anna.cpp:59:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |   while(cur_pos<N && cur_bit<info_bits.size()){
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~
Anna.cpp:31:8: warning: variable 'mySet' set but not used [-Wunused-but-set-variable]
   31 |   auto mySet = [&](int pos, int val){
      |        ^~~~~

Bruno.cpp: In function 'long long int Bruno(int, int*)':
Bruno.cpp:26:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   for(int i = 0; i<bits.size(); i+=2){
      |                  ~^~~~~~~~~~~~
Bruno.cpp:17:6: warning: unused variable 'res' [-Wunused-variable]
   17 |   ll res= 0;
      |      ^~~

• Subtask 1: 85 / 100