Submission #417848

#	Time	Username	Problem	Language	Result	Execution time	Memory
417848		rumen_m	Combo (IOI18_combo)	C++17	100 / 100	50 ms	644 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
string s="";
string guess_sequence(int N)
{
    string p;

    char A,B,C;
    p = "XY";
    if(press(p)>0)
    {
        p = "X";
        if(press(p)==1)
        {

            A = 'A';
            B = 'B';
            C = 'Y';
            s = "X";
        }
        else
        {
            A = 'A';
            B = 'B';
            C = 'X';
            s = "Y";
        }
    }
    else
    {
        p = "A";
        if(press(p)==1)
        {

            A = 'X';
            B = 'B';
            C = 'Y';
            s = "A";
        }
        else
        {
            A = 'A';
            B = 'Y';
            C = 'X';
            s = "B";
        }
    }

    for(int i=2; i<N; i++)
    {
        p = s+A+s+B+A+s+B+B+s+B+C;
        int k = press(p);
        if(k==s.size())s+=C;
        if(k==s.size()+1)s+=A;
        if(k==s.size()+2)s+=B;
    }
    if(s.size()!=N)
    {
        p = s+A;
        if(press(p)==N)
        {
            s+=A;
            return s;
        }
        p = s+B;
        if(press(p)==N)
        {
            s+=B;
            return s;
        }
        s = s+C;
        return s;
    }

    return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:54:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |         if(k==s.size())s+=C;
      |            ~^~~~~~~~~~
combo.cpp:55:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |         if(k==s.size()+1)s+=A;
      |            ~^~~~~~~~~~~~
combo.cpp:56:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         if(k==s.size()+2)s+=B;
      |            ~^~~~~~~~~~~~
combo.cpp:58:16: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   58 |     if(s.size()!=N)
      |        ~~~~~~~~^~~

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