Submission #1039370

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039370		Maite_Morale	Prisoner Challenge (IOI22_prison)	C++17	65 / 100	9 ms	1116 KiB

prison

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
ll x=24;
ll bsbit=8;
ll r[2]={-1,-2};//Respuesta
vector<int> bs={2187,729,243,81,27,9,3,1};
std::vector<std::vector<int>> devise_strategy(int N) {
  vector<vector<int>> v (x+1,vector<int> (N + 1, 0));
  for(int i=0;i<=x;i++){
      if(i==0){
          v[0][0]=1;
          for(int j=1;j<=N;j++){
              ll valuebit=(j/bs[0])%3;
              v[i][j]=1+(valuebit*bsbit+0);
              //cerr<<v[i][j]<<" ";
          }//cerr<<"\n\n";
          continue;
      }//cout
      ll inf=i-1;
      ll bit=inf%bsbit;
      ll value=inf/bsbit;
      v[i][0]=bit%2;
      for(int j=1;j<=N;j++){
          ll valuebit=(j/bs[bit])%3;
          ll valuenext=0;
          if(bit+1<bs.size())valuenext=(j/bs[bit+1])%3;
          if(value==valuebit){
             v[i][j]=1+(valuenext*bsbit+bit+1);
          }
          else{
            if(valuebit<value)v[i][j]=r[v[i][0]];
            else              v[i][j]=r[v[i][0]^1];
          }
          //cerr<<v[i][j]<<" ";
      }//cerr<<"\n\n";
  }
return v;
}

Compilation message (stderr)

prison.cpp: In function 'std::vector<std::vector<int> > devise_strategy(int)':
prison.cpp:27:19: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |           if(bit+1<bs.size())valuenext=(j/bs[bit+1])%3;
      |              ~~~~~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 55 / 90