Submission #745638

#	Time	Username	Problem	Language	Result	Execution time	Memory
745638		borisAngelov	Combo (IOI18_combo)	C++17	100 / 100	35 ms	632 KiB

combo

#include <iostream>
#include <string>
#include "combo.h"

using namespace std;

string guess_sequence(int n)
{
    string s = "";

    string p = "XY";

    char a, b, c;

    if (press(p) > 0)
    {
        p = "X";

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

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

    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;
        }
        else if (k == s.size() + 1)
        {
            s += a;
        }
        else
        {
            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 += c;
        return s;
    }

    return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:60:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |         if (k == s.size())
      |             ~~^~~~~~~~~~~
combo.cpp:64:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |         else if (k == s.size() + 1)
      |                  ~~^~~~~~~~~~~~~~~
combo.cpp:74:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   74 |     if (s.size() != n)
      |         ~~~~~~~~~^~~~

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