Submission #594480

#	Time	Username	Problem	Language	Result	Execution time	Memory
594480		yutabi	Combo (IOI18_combo)	C++17	5 / 100	1 ms	280 KiB

combo

#include "combo.h"


#include <bits/stdc++.h>
using namespace std;




std::string guess_sequence(int N)
{
    char start='A';

    char buttons[]={'A','B','X'};

    string ans="";

    string query="";

    query="AB";

    if(press(query)>0)
    {
        query="A";

        if(press(query)>0)
        {
            start='A';
        }

        else
        {
            start='B';
        }
    }

    else
    {
        query="X";

        if(press(query)>0)
        {
            start='X';
        }

        else
        {
            start='Y';
        }
    }

    if(buttons[0]==start)
    {
        swap(buttons[0],buttons[1]);
    }

    if(buttons[1]==start)
    {
        swap(buttons[2],buttons[1]);
    }

    if(buttons[2]==start)
    {
        buttons[2]='Y';
    }

    //cout << start << ' ' << buttons[0] << ' ' << buttons[1] << ' ' << buttons[2] << endl;

    ans="";
    ans+=start;

    for(int i=1;i<N-1;i++)
    {
        query="";

        for(int j=0;j<ans.size();j++)
        {
            query+=ans[j];
        }

        query+=buttons[0];
        query+=buttons[0];

        for(int j=0;j<ans.size();j++)
        {
            query+=ans[j];
        }

        query+=buttons[0];
        query+=buttons[1];

        for(int j=0;j<ans.size();j++)
        {
            query+=ans[j];
        }

        query+=buttons[0];
        query+=buttons[2];

        for(int j=0;j<ans.size();j++)
        {
            query+=ans[j];
        }

        query+=buttons[1];

        //cout << query << endl;

        int res=press(query);

        if(res==i)
        {
            ans+=buttons[2];
        }

        if(res==i+1)
        {
            ans+=buttons[1];
        }

        if(res==i+2)
        {
            ans+=buttons[0];
        }
    }

    query="";

    for(int i=0;i<ans.size();i++)
    {
        query+=ans[i];
    }

    query+=buttons[0];

    if(press(query)==N)
    {
        ans+=buttons[0];
    }

    else
    {
        query="";

        for(int i=0;i<ans.size();i++)
        {
            query+=ans[i];
        }

        query+=buttons[1];

        if(press(query)==N)
        {
            ans+=buttons[1];
        }

        else
        {
            ans+=buttons[2];
        }
    }


    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:76:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |         for(int j=0;j<ans.size();j++)
      |                     ~^~~~~~~~~~~
combo.cpp:84:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |         for(int j=0;j<ans.size();j++)
      |                     ~^~~~~~~~~~~
combo.cpp:92:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |         for(int j=0;j<ans.size();j++)
      |                     ~^~~~~~~~~~~
combo.cpp:100:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |         for(int j=0;j<ans.size();j++)
      |                     ~^~~~~~~~~~~
combo.cpp:129:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  129 |     for(int i=0;i<ans.size();i++)
      |                 ~^~~~~~~~~~~
combo.cpp:145:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  145 |         for(int i=0;i<ans.size();i++)
      |                     ~^~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95