Submission #911414

#	Time	Username	Problem	Language	Result	Execution time	Memory
911414		Turcavid	Combo (IOI18_combo)	C++14	5 / 100	1 ms	344 KiB

combo

#include "combo.h"
#include <vector>
 
using namespace std;
 
string guess_sequence(int N)
{
    vector<char> v;
    v.push_back('A');
    v.push_back('B');
    v.push_back('X');
    v.push_back('Y');
    int del=3;
    string sus="";
    for(int i=0; i<3; i++)
    {
        sus.clear();
        sus.push_back(v[i]);
        if(press(sus) == 1)
            del=i;
    }
    string ans="";
    ans+=v[del];
    v.erase(v.begin()+del);
    for(int i=2; i<=N-1; i++)
    {
      	if(N > 3)
        {
          ans+=v[0];
          continue;
        }
        string qr="";
        qr+=ans;
        qr+=v[1];
        qr+=ans;
        qr+=v[2];
        qr+=v[0];
        qr+=ans;
        qr+=v[2];
        qr+=v[1];
        qr+=ans;
        qr+=v[2];
        qr+=v[2];
        int val=press(qr);
        if(val == i-1)
            ans+=v[0];
        if(val == i)
            ans+=v[1];
        if(val == i+1)
            ans+=v[2];
    }
  	if(ans.size() != N-1)
      press("wth");
    for(int i=0; i<3; i++)
    {
        string qr=ans;
        qr+=v[i];
        if(press(qr) == N)
            return qr;
    }
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:52:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   52 |    if(ans.size() != N-1)
      |       ~~~~~~~~~~~^~~~~~
combo.cpp:8:18: warning: control reaches end of non-void function [-Wreturn-type]
    8 |     vector<char> v;
      |                  ^

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