Submission #173665

#	Time	Username	Problem	Language	Result	Execution time	Memory
173665		RafaelSus	"The Lyuboyn" code (IZhO19_lyuboyn)	C++14	100 / 100	163 ms	7664 KiB

lyuboyn

#include <bits/stdc++.h>
 
using namespace std;
const int N = 1e5 + 5;
typedef long long ll;
const ll inf=1e15;
#define pb push_back
const int INF=(0x3f3f3f3f);

int tod(vector<int>a){
  int res=0;
  reverse(a.begin(),a.end());
  for(int i=0;i<a.size();i++){
    res+=a[i]*(1<<i);
  }
  return res;
}

int tod(string s){
  int res=0;
  reverse(s.begin(),s.end());
  for(int i=0;i<s.size();i++){
    res+=(s[i]-'0')*(1<<i);
  }
  return res;
}

string tobin(int x,int h){
  string res="";
  if(x==0){
    res="0";
    while(res.size()<h)res+="0";
    return res;
  }
  while(x){
    if(x%2)res+="1";
    else res+="0";
    x/=2;
  }
  while(res.size()<h)res+="0";
  reverse(res.begin(),res.end());
  return res;
}
int n,k,t;

int used[(1<<18)+5];

int main(){
  ios::sync_with_stdio(false);
  cin.tie(0);cout.tie(0);
  
  
  cin>>n>>k>>t;
  string s;
  cin>>s;
  int x=tod(s);
  vector<int>a(n,0);
  for(int i=0;i<k;i++){
    a[n-1-i]=1;
  }
  if(k%2==0){
    cout<<"-1";
    return 0;  
  }
  used[x]=1;
  vector<int>answ;
  answ.pb(x);
  int tmp=x;
  int tim=0,hin=0;
  int X=0;
  while(answ.size()<(1<<n)){
    do{
      if(answ.size()==(1<<n))break;
      int y=tod(a);
      if(!used[y^tmp]){
        answ.pb(y^tmp);
        tmp^=y;
        used[tmp]=1;
        break;
      }
    }while(next_permutation(a.begin(),a.end()));
    for(int i=0;i<(n-k);i++)a[i]=0;
    for(int i=n-k;i<n;i++)a[i]=1;
    if(tim==answ.size()&&tim==hin&&X==10)break;
    if(tim==answ.size()){X++;hin=tim;}
    tim=answ.size();
  }
  if(answ.size()!=(1<<n)){
    cout<<"-1\n";
    return 0;
  }
  cout<<(1<<n)<<'\n';
  for(int i=0;i<answ.size();i++){
    cout<<tobin(answ[i],n)<<'\n';
  }
}

Compilation message (stderr)

lyuboyn.cpp: In function 'int tod(std::vector<int>)':
lyuboyn.cpp:13:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<a.size();i++){
               ~^~~~~~~~~
lyuboyn.cpp: In function 'int tod(std::__cxx11::string)':
lyuboyn.cpp:22:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<s.size();i++){
               ~^~~~~~~~~
lyuboyn.cpp: In function 'std::__cxx11::string tobin(int, int)':
lyuboyn.cpp:32:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(res.size()<h)res+="0";
           ~~~~~~~~~~^~
lyuboyn.cpp:40:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(res.size()<h)res+="0";
         ~~~~~~~~~~^~
lyuboyn.cpp: In function 'int main()':
lyuboyn.cpp:71:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(answ.size()<(1<<n)){
         ~~~~~~~~~~~^~~~~~~
lyuboyn.cpp:73:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       if(answ.size()==(1<<n))break;
          ~~~~~~~~~~~^~~~~~~~
lyuboyn.cpp:84:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(tim==answ.size()&&tim==hin&&X==10)break;
        ~~~^~~~~~~~~~~~~
lyuboyn.cpp:85:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(tim==answ.size()){X++;hin=tim;}
        ~~~^~~~~~~~~~~~~
lyuboyn.cpp:88:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(answ.size()!=(1<<n)){
      ~~~~~~~~~~~^~~~~~~~
lyuboyn.cpp:93:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<answ.size();i++){
               ~^~~~~~~~~~~~

• Subtask 1: 0 / 0
• Subtask 2: 5 / 5
• Subtask 3: 3 / 3
• Subtask 4: 11 / 11
• Subtask 5: 15 / 15
• Subtask 6: 18 / 18
• Subtask 7: 31 / 31
• Subtask 8: 17 / 17