Submission #849541

#	Time	Username	Problem	Language	Result	Execution time	Memory
849541		Bach21	Combo (IOI18_combo)	C++14	100 / 100	18 ms	1960 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
using namespace std;
const int m=4;
string gue="ABXY";
string guess_sequence(int N) {
    string s;
    int tmp=press("AB");
    if (tmp!=0)
    {
        tmp=press("A");
        if (tmp!=0)
        {
            s+='A';
            gue.erase(gue.begin());
        } else
        {
            s+='B';
            gue.erase(gue.begin()+1);
        }
    } else
    {
        tmp=press("X");
        if (tmp!=0)
        {
            s+='X';
            gue.erase(gue.begin()+2);
        } else
        {
            s+='Y';
            gue.erase(gue.begin()+3);
        }
    }
    for (int i=0;i<N-2;i++)
    {
        string tmp="";
        for (int j=0;j<gue.size();j++)
        {
            tmp+=s+gue[0]+gue[j];
        }
        tmp+=s+gue[1];
        int len=press(tmp);
        if (len==i+3)
        {
            s+=gue[0];
        } else if (len==i+2)
        {
            s+=gue[1];
        } else s+=gue[2];
    }
    if (N>1)
    {
        for (int i=0;i<gue.size()-1;i++)
        {
            string tmp=s;
            tmp+=gue[i];
            int len=press(tmp);
            if (len==N)
            {
                s+=gue[i];
                break;
            }
            if (i==gue.size()-2) s+=gue[gue.size()-1];
        }
    }
    return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:37:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         for (int j=0;j<gue.size();j++)
      |                      ~^~~~~~~~~~~
combo.cpp:53:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   53 |         for (int i=0;i<gue.size()-1;i++)
      |                      ~^~~~~~~~~~~~~
combo.cpp:63:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |             if (i==gue.size()-2) s+=gue[gue.size()-1];
      |                 ~^~~~~~~~~~~~~~

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