Submission #136682

#	Time	Username	Problem	Language	Result	Execution time	Memory
136682		WongHokFong_cpp	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include <iostream>
#include <cstdio>
#include "combo.h"
#include <string>
using namespace std;
string a,b,c;
int visited[5];
string guess_sequence(int N)
{
	string ans;
	if (press("AB")>=1)
	{
		if (press("A")==1)
		{
			ans+="A";
			a="B",b="X",c="Y";
		}
		else 
		{
			ans+="B";
			a="A",b="X",c="Y";
		}
	}
	else
	{
		if (press("X")==1)
		{
			ans+="X";
			a="A",b="B",c="Y";
		}
		else 
		{
			ans+="Y";
			a="A",b="B",c="X";
		}
	}
	for (int i=2;i<=n-1;i++)
	{
		int rec=press(ans+a+ans+b+c+ans+b+a+ans+b+b);
		if (rec==i+1) ans+=a;
		else if (rec==i+2) ans+=b;
		else ans+=c;
	}
	int rec=press(ans+a);
	if (rec==n) 
	{
		ans+=a;return ans;
	}
	int rec=press(ans+b);
	if (rec==n) 
	{
		ans+=b;return ans;
	}
	ans+=c;return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:37:18: error: 'n' was not declared in this scope
   37 |  for (int i=2;i<=n-1;i++)
      |                  ^
combo.cpp:45:11: error: 'n' was not declared in this scope
   45 |  if (rec==n)
      |           ^
combo.cpp:49:6: error: redeclaration of 'int rec'
   49 |  int rec=press(ans+b);
      |      ^~~
combo.cpp:44:6: note: 'int rec' previously declared here
   44 |  int rec=press(ans+a);
      |      ^~~
combo.cpp:50:11: error: 'n' was not declared in this scope
   50 |  if (rec==n)
      |           ^