Submission #916725

#	Time	Username	Problem	Language	Result	Execution time	Memory
916725		andrei_iorgulescu	Combo (IOI18_combo)	C++14	100 / 100	14 ms	2052 KiB

combo

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

using namespace std;

string guess_sequence(int N)
{
    char firstc;
    int x = press("AB");
    if (x == 0)
    {
        int y = press("X");
        if (y == 0)
            firstc = 'Y';
        else
            firstc = 'X';
    }
    else
    {
        int y = press("A");
        if (y == 0)
            firstc = 'B';
        else
            firstc = 'A';
    }
    if (N == 1)
    {
        string ret;
        ret.push_back(firstc);
        return ret;
    }
    string restul;
    if (firstc == 'A')
        restul = "BXY";
    else if (firstc == 'B')
        restul = "AXY";
    else if (firstc == 'X')
        restul = "ABY";
    else
        restul = "ABX";
    string ans;
    ans.push_back(firstc);
    for (int i = 2; i < N; i++)
    {
        ///restul[0] deloc, restul[1] singur, restul[2] cu orice dupa
        string idfk;
        string s1,s2,s3,s4;
        s1 = ans + restul[1];
        s2 = ans + restul[2] + restul[0];
        s3 = ans + restul[2] + restul[1];
        s4 = ans + restul[2] + restul[2];
        idfk = s1 + s2 + s3 + s4;
        int idk = press(idfk);
        if (idk == ans.size())
            ans.push_back(restul[0]);
        else if (idk == ans.size() + 1)
            ans.push_back(restul[1]);
        else
            ans.push_back(restul[2]);
    }
    for (int i = 0; i < 2; i++)
    {
        string idfk;
        idfk = ans + restul[i];
        int idk = press(idfk);
        if (idk == N)
            return idfk;
    }
    string idfk = ans + restul[2];
    return idfk;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:54:17: 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 (idk == ans.size())
      |             ~~~~^~~~~~~~~~~~~
combo.cpp:56:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |         else if (idk == ans.size() + 1)
      |                  ~~~~^~~~~~~~~~~~~~~~~

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