Submission #770720

#	Time	Username	Problem	Language	Result	Execution time	Memory
770720		AtinaR	Combo (IOI18_combo)	C++14	5 / 100	1 ms	208 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
 
std::string guess_sequence(int N)
{
    char first;
    int f=press("AB");
    if(f>=1)
    {
        f=press("A");
        if(f>=1)
        {
            first='A';
        }
        else
        {
            first='B';
        }
    }
    else
    {
        f=press("X");
        if(f>=1)
        {
            first='X';
        }
        else first='Y';
    }
    string res="";
    res+=first;
    char possible[3];
    if(first=='X')
    {
        possible[0]='A';
        possible[1]='B';
        possible[2]='Y';
    }
    else if(first=='Y')
    {
        possible[0]='A';
        possible[1]='B';
        possible[2]='X';
    }
    else if(first=='A')
    {
        possible[0]='X';
        possible[1]='B';
        possible[2]='Y';
    }
    else if(first=='B')
    {
        possible[0]='A';
        possible[1]='X';
        possible[2]='Y';
    }
    while((int)res.size()<N-1)
    {
        string cnt=res+possible[0]+  res+possible[1]+possible[0] + res+possible[1]+possible[1] + res+possible[1]+possible[2];
        int tmp=press(cnt);
        if(tmp==res.size()+1)
        {
            res+=possible[0];
        }
        else if(tmp==res.size()+2)
        {
            res+=possible[1];
        }
        else if(tmp==res.size())
        {
            res+=possible[2];
        }
    }
    int tmp;
    if(press(res+possible[0])==N)
    {
        res+=possible[0];
    }
    else if(press(res+possible[1])==N)
    {
        res+=possible[1];
    }
    else
    {
        res+=possible[2];
    }
    return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:61:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |         if(tmp==res.size()+1)
      |            ~~~^~~~~~~~~~~~~~
combo.cpp:65:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         else if(tmp==res.size()+2)
      |                 ~~~^~~~~~~~~~~~~~
combo.cpp:69:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |         else if(tmp==res.size())
      |                 ~~~^~~~~~~~~~~~
combo.cpp:74:9: warning: unused variable 'tmp' [-Wunused-variable]
   74 |     int tmp;
      |         ^~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95