Submission #401520

#	Time	Username	Problem	Language	Result	Execution time	Memory
401520		tredsused70	Combo (IOI18_combo)	C++17	30 / 100	77 ms	436 KiB

combo

#include <bits/stdc++.h>

using namespace std;

int press(string p);

string guess_sequence(int n)
{
    string ans,help;
    char st;
    if(press("AX"))
    {
        if(press("A")==1)
            ans="A";
        else
            ans="X";
    }
    else
    {
        if(press("B")==1)
            ans="B";
        else
            ans="Y";
    }
    st=ans[0];
    for(int i=1;i<n;i++)
    {
        help=ans+"A";
        help+=ans+"B";
        if(press(help)==i+1)
        {
            if(press(ans+"A")==i+1)
                ans+="A";
            else
                ans+="B";
        }
        else
        {
            if(press(ans+"X")==i+1)
                ans+="X";
            else
                ans+="Y";
        }
        help.clear();
    }
    return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:10:10: warning: variable 'st' set but not used [-Wunused-but-set-variable]
   10 |     char st;
      |          ^~

• Subtask 1: 5 / 5
• Subtask 2: 25 / 95