Submission #317545

#	Time	Username	Problem	Language	Result	Execution time	Memory
317545		daniel920712	Hidden Sequence (info1cup18_hidden)	C++14	20 / 100	9 ms	384 KiB

hidden

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

using namespace std;
vector < pair < vector < int > , int > > all;
vector < int > temp;
vector < int > tt;
vector < int > ans;
vector < int > ans2;
vector < int > ans3;
set < int > have;
vector < int > Not;
deque < int > fin;
int con[5005]={0};
vector < int > findSequence (int N)
{
    int i,j,k,l,ok=0,now=0,x1=0,y1=0,x,y,ll,rr;
    if(N<=10)
    {
        for(i=0;i<(1<<(N/2+1));i++)
        {
            temp.clear();
            for(j=0;j<(N/2+1);j++)
            {
                if(i&(1<<j)) temp.push_back(1);
                else temp.push_back(0);
            }
            all.push_back(make_pair(temp,isSubsequence(temp)));
        }
        for(i=0;i<(1<<N);i++)
        {
            temp.clear();
            for(j=0;j<N;j++)
            {
                if(i&(1<<j)) temp.push_back(1);
                else temp.push_back(0);
            }
            ok=1;
            for(auto j:all)
            {
                now=0;
                for(auto k:temp)
                {
                    if(now<N/2+1&&k==j.first[now]) now++;
                }
                if(now==N/2+1&&j.second==0) ok=0;
                if(now!=N/2+1&&j.second==1) ok=0;
            }
            if(ok) return temp;
        }
        temp.clear();
        return temp;
    }
    else
    {
        for(i=0;i<N/2+1;i++)
        {
            temp.push_back(0);
            if(!isSubsequence(temp))
            {
                x=i;
                break;
            }
        }
        temp.clear();
        if(i==N/2+1)
        {
            for(i=0;i<N/2+1;i++)
            {
                temp.push_back(1);
                if(!isSubsequence(temp))
                {
                    x=N-i;
                    break;
                }
            }
        }
        y=N-x;
        if(x<=N/2)
        {
            for(i=0;i<=x;i++) have.insert(i);

            for(i=1;have.size()>1;i++)
            {
                //printf("aa %d %d\n",i,have.size());
                Not.clear();
                for(auto j:have)
                {
                    temp.clear();
                    now=0;
                    for(k=0;k<=x;k++)
                    {
                        ll=k;
                        rr=x-k;
                        if(j==k) for(l=0;l<i;l++) fin.push_back(1);
                        if(k!=x) fin.push_back(0);
                    }
                    while(fin.size()>N/2+3)
                    {
                        if(ll<=1)
                        {
                            fin.pop_back();
                            rr--;
                        }
                        else if(rr<=1)
                        {
                            fin.pop_front();
                            ll--;
                        }
                        else if(now%2)
                        {
                            now++;
                            ll--;
                            fin.pop_front();
                        }
                        else 
                        {
                            now++;
                            rr--;
                            fin.pop_back();
                        }
                    }
                    while(!fin.empty())
                    {
                        temp.push_back(fin.front());
                        fin.pop_front();
                    }
                    if(!isSubsequence(temp))
                    {
                        //printf("bb %d\n",j);
                        con[j]=i-1;
                        y-=(i-1);
                        Not.push_back(j);
                    }
                }
                for(auto j:Not) have.erase(j);
            }
            if(!have.empty()) con[*have.begin()]=y;

            for(i=0;i<=x;i++)
            {
                for(j=0;j<con[i];j++) ans.push_back(1);
                if(i!=x) ans.push_back(0);
            }

            return ans;
        }
        else
        {
            for(i=0;i<=y;i++) have.insert(i);
            for(i=1;have.size()>1;i++)
            {
                Not.clear();
                for(auto j:have)
                {
                    temp.clear();
                    for(k=0;k<=y;k++)
                    {
                        if(j==k) for(l=0;l<i;l++) temp.push_back(0);
                        if(k!=y) temp.push_back(1);
                    }
                    if(!isSubsequence(temp))
                    {
                        //printf("bb %d\n",j);
                        con[j]=i-1;
                        x-=(i-1);
                        Not.push_back(j);
                    }
                }
                for(auto j:Not) have.erase(j);
            }
            if(!have.empty()) con[*have.begin()]=x;

            for(i=0;i<=y;i++)
            {
                for(j=0;j<con[i];j++) ans.push_back(0);
                if(i!=y) ans.push_back(1);
            }

            return ans;
        }

    }
}

Compilation message (stderr)

hidden.cpp: In function 'std::vector<int> findSequence(int)':
hidden.cpp:98:37: warning: comparison of integer expressions of different signedness: 'std::deque<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   98 |                     while(fin.size()>N/2+3)
      |                           ~~~~~~~~~~^~~~~~
hidden.cpp:17:28: warning: unused variable 'x1' [-Wunused-variable]
   17 |     int i,j,k,l,ok=0,now=0,x1=0,y1=0,x,y,ll,rr;
      |                            ^~
hidden.cpp:17:33: warning: unused variable 'y1' [-Wunused-variable]
   17 |     int i,j,k,l,ok=0,now=0,x1=0,y1=0,x,y,ll,rr;
      |                                 ^~
hidden.cpp:108:31: warning: 'll' may be used uninitialized in this function [-Wmaybe-uninitialized]
  108 |                             ll--;
      |                             ~~^~
hidden.cpp:17:38: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   17 |     int i,j,k,l,ok=0,now=0,x1=0,y1=0,x,y,ll,rr;
      |                                      ^
grader.cpp: In function 'int main()':
grader.cpp:28:26: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   28 |     fprintf (fifo_out, "%d\n", ans.size ());
      |                         ~^     ~~~~~~~~~~~
      |                          |              |
      |                          int            std::vector<int>::size_type {aka long unsigned int}
      |                         %ld
grader.cpp:29:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for (int i=0; i<ans.size () && i < N; i++)
      |                   ~^~~~~~~~~~~~

• Subtask 1: 20 / 20
• Subtask 2: 0 / 80