Submission #103627

#	Time	Username	Problem	Language	Result	Execution time	Memory
103627		medk	Combo (IOI18_combo)	C++14	5 / 100	2 ms	256 KiB

combo

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

using namespace std;

#define ll long long

string guess_sequence(int N)
{
    string ans="";
    char ci[4]={'A','B','X','Y'};
    char c[3];
    if(press("AB")>0)
    {
        if(press("A")>0) ans="A";
        else ans="B";
    }
    else
    {
        if(press("X")>0) ans="X";
        else ans="Y";
    }
    int ind=0;
    for(int i=0;i<4;i++)
    {
        if(ans[0]!=ci[i])
        {
            c[ind]=ci[i];
            ind++;
        }
    }
    for(int i=0;i<N-2;i++)
    {
        string pr=ans+c[0]+ans+c[1]+c[0]+ans+c[1]+c[1]+ans+c[1]+c[2];
        int get=press(pr);
        if(get==ans.length())
        {
            ans+=c[2];
        }
        else if(get==ans.length()+1)
        {
            ans+=c[0];
        }
        else
        {
            ans+=c[1];
        }
    }
    if(press(ans+c[0])==N) ans+=c[0];
    else if(press(ans+c[1])==N) ans+=c[1];
    else ans+=c[2];
    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:36:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         if(get==ans.length())
      |            ~~~^~~~~~~~~~~~~~
combo.cpp:40:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         else if(get==ans.length()+1)
      |                 ~~~^~~~~~~~~~~~~~~~

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