Submission #571041

#	Time	Username	Problem	Language	Result	Execution time	Memory
571041		mihai145	Combo (IOI18_combo)	C++14	5 / 100	1 ms	312 KiB

combo

#include "combo.h"

std::string guess_sequence(int N) {
    std::string p = "";
    if(press("AB")==0)
        {
        if(press("X")==1)
            p+="X";
        else
            p+="Y";
        }
    else
        {
            if(press("A")==1)
                p+="A";
            else
                p+="B";
        }
    char v[3]={0};
    if(p[0]=='A')
    {
        v[0]='B';
        v[1]='X';
        v[2]='Y';
    }
    if(p[0]=='B')
    {
        v[0]='A';
        v[1]='X';
        v[2]='Y';
    }
    if(p[0]=='X')
    {
        v[0]='B';
        v[1]='A';
        v[2]='Y';
    }
    if(p[0]=='Y')
    {
        v[0]='B';
        v[1]='X';
        v[2]='A';
    }
    for(int i=2;i<=N-1;i++)
    {

        int ans=press(p+v[0]+v[0]+p+v[0]+v[1]+p+v[0]+v[2]+p+v[1]);
        if(ans==p.size())
            p+=v[2];
        else
            if(ans==p.size()+1)
                p+=v[1];
            else
                p+=v[0];
    }

    if(press(p+v[0])==N-1)
    {
        if(press(p+v[1])==N)
            p+=v[1];
        else
            p+=v[2];
    }
    else
        p+=v[0];

  return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:48:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |         if(ans==p.size())
      |            ~~~^~~~~~~~~~
combo.cpp:51:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |             if(ans==p.size()+1)
      |                ~~~^~~~~~~~~~~~

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