Submission #916923

#	Time	Username	Problem	Language	Result	Execution time	Memory
916923		manishjha91	Combo (IOI18_combo)	C++17	0 / 100	2 ms	696 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;

string guess_sequence(int N){
	vector<char> v = {'A','B','X','Y'};
	string s = "";
	int f = -1;
	for(int i=0; i<2; i++)
	{
		if(f!=-1) break;
		string curr = ""+string(1,v[2*i]) + string(1,v[2*i+1]);
		if(press(curr))
		{
			for(int j=0; j<2; j++)
			{
				if(press(string(1,v[2*i+j])))
				{
					f = 2*i + j;
					break;
				}
			}
		}
	}
	s.push_back(v[f]);
	swap(v[f],v.back());
	v.pop_back();
	
	

	while(s.size()<N)
	{
		int n = s.size();
		string s1 = s;
		string s2 = s;
		string s3 = s;
		string s4 = s;
		if(n==N-1)
		{
			s1.push_back(v[0]);
			s2.push_back(v[1]);
			s3.push_back(v[2]);
			if(press(s1)==N)
			{
				return s1;
			}
			if(press(s2)==N)
			{
				return s2;
			}
			return s3;
		}

		s1+=v[0]+v[0];
		s2+=v[0]+v[1];
		s3+=v[0]+v[2];
		s4+=v[1];
		
		string curr = s1 + s2 + s3 + s4;
		
		int cnt = press(curr);
		if(cnt==n+2)
		{
			s.push_back(v[0]);
		}
		else if(cnt==n+1) s.push_back(v[1]);
		else s.push_back(v[2]);
		
	}
	
	
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:31:16: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   31 |  while(s.size()<N)
      |        ~~~~~~~~^~
combo.cpp:6:35: warning: control reaches end of non-void function [-Wreturn-type]
    6 |  vector<char> v = {'A','B','X','Y'};
      |                                   ^

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