Submission #750315

#	Time	Username	Problem	Language	Result	Execution time	Memory
750315		vjudge1	Combo (IOI18_combo)	C++14	100 / 100	33 ms	676 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
using namespace std;
string guess_sequence(int N) {
  string p = "AB";
    int c=press(p);
    string ans;
    if(c==2)
    {
        ans+='A';
    }
    else if(c==1)
    {
        p='A';
        c=press(p);
        if(c)
            ans+='A';
        else ans+='B';
    }
    else
    {
        p='X';
        c=press(p);
        if(c)
            ans+='X';
        else ans+='Y';
    }
    if(N==1)return ans;
    for(int i=1;i<N-1;i++)
    {
        if(ans[0]=='A')
        {
            string temp=ans;
            temp+='B';
            temp+=ans;
            temp+="XB";
            temp+=ans;
            temp+="XY";
            temp+=ans;
            temp+="XX";
            c=press(temp);
            if(c==1+ans.size())
            {
                ans+='B';
            }
            else if(c==2+ans.size())
            {
                ans+='X';
            }
            else ans+='Y';
        }
        else if(ans[0]=='B')
        {
            string temp=ans;
            temp+='A';
            temp+=ans;
            temp+="XA";
            temp+=ans;
            temp+="XY";
            temp+=ans;
            temp+="XX";
            c=press(temp);
            if(c==1+ans.size())
            {
                ans+='A';
            }
            else if(c==2+ans.size())
            {
                ans+='X';
            }
            else ans+='Y';
        }
        else if(ans[0]=='X')
        {
            string temp=ans;
            temp+='B';
            temp+=ans;
            temp+="AB";
            temp+=ans;
            temp+="AY";
            temp+=ans;
            temp+="AA";
            c=press(temp);
            if(c==1+ans.size())
            {
                ans+='B';
            }
            else if(c==2+ans.size())
            {
                ans+='A';
            }
            else ans+='Y';
        }
        else
        {
            string temp=ans;
            temp+='B';
            temp+=ans;
            temp+="XB";
            temp+=ans;
            temp+="XA";
            temp+=ans;
            temp+="XX";
            c=press(temp);
            if(c==1+ans.size())
            {
                ans+='B';
            }
            else if(c==2+ans.size())
            {
                ans+='X';
            }
            else ans+='A';
        }
    }
    string temp=ans;
    if(ans[0]=='A')
    {
        temp+='B';
        c=press(temp);
        if(c==N)
            ans+='B';
        else
        {
            temp[temp.size()-1]='X';
            c=press(temp);
            if(c==N)
                ans+='X';
            else ans+='Y';
        }
    }
    else if(ans[0]=='B')
    {
        temp+='A';
        c=press(temp);
        if(c==N)
            ans+='A';
        else
        {
            temp[temp.size()-1]='X';
            c=press(temp);
            if(c==N)
                ans+='X';
            else ans+='Y';
        }
    }
    else if(ans[0]=='X')
    {
        temp+='B';
        c=press(temp);
        if(c==N)
            ans+='B';
        else
        {
            temp[temp.size()-1]='A';
            c=press(temp);
            if(c==N)
                ans+='A';
            else ans+='Y';
        }
    }
    else
    {
        temp+='B';
        c=press(temp);
        if(c==N)
            ans+='B';
        else
        {
            temp[temp.size()-1]='X';
            c=press(temp);
            if(c==N)
                ans+='X';
            else ans+='A';
        }
    }
  return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:42:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |             if(c==1+ans.size())
      |                ~^~~~~~~~~~~~~~
combo.cpp:46:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |             else if(c==2+ans.size())
      |                     ~^~~~~~~~~~~~~~
combo.cpp:63:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |             if(c==1+ans.size())
      |                ~^~~~~~~~~~~~~~
combo.cpp:67:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |             else if(c==2+ans.size())
      |                     ~^~~~~~~~~~~~~~
combo.cpp:84:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |             if(c==1+ans.size())
      |                ~^~~~~~~~~~~~~~
combo.cpp:88:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |             else if(c==2+ans.size())
      |                     ~^~~~~~~~~~~~~~
combo.cpp:105:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  105 |             if(c==1+ans.size())
      |                ~^~~~~~~~~~~~~~
combo.cpp:109:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  109 |             else if(c==2+ans.size())
      |                     ~^~~~~~~~~~~~~~

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