Submission #79484

#	Time	Username	Problem	Language	Result	Execution time	Memory
79484		alextodoran	Combo (IOI18_combo)	C++14	100 / 100	49 ms	524 KiB

combo

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

using namespace std;
/*
string combo;

int press(string p)
{
    for(int i = 0; i < combo.size(); i++)
    {
        int ok1 = 0;
        for(int j = 0; j < p.size() - i; j++)
        {
            int ok = 1;
            for(int k = j; k <= j + i; k++)
                if(p[k] != combo[k - j])
                {
                    ok = 0;
                    break;
                }
            if(ok == 1)
            {
                ok1 = 1;
                break;
            }
        }
        if(ok1 == 0)
            return i;
    }
    return combo.size();
}*/

string guess_sequence(int N)
{
    string b[] = {"A", "B", "X", "Y"};
    vector <string> b1;
    b1.clear();
    string pref = "";
    if(press("AX"))
    {
        if(press("A"))
            pref = "A";
        else
            pref = "X";
    }
    else
    {
        if(press("B"))
            pref = "B";
        else
            pref = "Y";
    }
    for(int i = 0; i < 4; i++)
        if(b[i] != pref)
            b1.push_back(b[i]);
    for(int i = 1; i < N - 1; i++)
    {
        int q = press(pref + b1[0] + pref + b1[1] + b1[0] + pref + b1[1] + b1[1] + pref + b1[1] + b1[2]);
        if(q == pref.size())
            pref += b1[2];
        else if(q == pref.size() + 1)
            pref += b1[0];
        else
            pref += b1[1];
    }
    if(N == 1)
        return pref;
    if(press(pref + b1[0] + pref + b1[1]) > pref.size())
    {
        if(press(pref + b1[0]) > pref.size())
            pref += b1[0];
        else
            pref += b1[1];
    }
    else
        pref += b1[2];
    return pref;
}
/*
int main()
{
    cin >> combo;
    cout << guess_sequence(combo.size());
    return 0;
}*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:60:14: 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(q == pref.size())
      |            ~~^~~~~~~~~~~~~~
combo.cpp:62:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |         else if(q == pref.size() + 1)
      |                 ~~^~~~~~~~~~~~~~~~~~
combo.cpp:69:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |     if(press(pref + b1[0] + pref + b1[1]) > pref.size())
      |        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
combo.cpp:71:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   71 |         if(press(pref + b1[0]) > pref.size())
      |            ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~

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