Submission #138252

#	Time	Username	Problem	Language	Result	Execution time	Memory
138252		Lawliet	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"

using namespace std;

char buttons[] = {'A' , 'B' , 'X' , 'Y'};

int N;

string S;
string remain;

int getInd(char a)
{
	for(int g = 0 ; g < 4 ; g++)
		if(buttons[g] == a) return g;
}

int press(string p)
{
	printf("-> %s\n",p.c_str());

	int a;
	scanf("%d",&a);

	return a;
}

void getFirstButton()
{
	if( press("AB") >= 1 )
	{
		if( press("A") == 1 ) S[0] = 'A';
		else S[0] = 'B';
	}
	else
	{
		if( press("C") == 1 ) S[0] = 'C';
		else S[0] = 'D';
	}
}

string guess_sequence(int n)
{
	N = n;

	getFirstButton();

	for(int h = 0 ; h < 4 ; h++)
		if(buttons[h] != S[0])
			remain = remain + buttons[h];

	for(int g = 1 ; g < N ; g++)
	{
		int cnt = 0;

		for(int h = 0 ; h < 2 ; h++)
		{
			//printf("S = %s\n",S.c_str());
			//S.push_back(remain[h]);
			if(press(S + remain[h]) == S.size() + 1)
			{
				S = S + remain[h];
				break;
			}
			//S.pop_back();
		}

		if(S.size() == g)
			S = S + remain[2];
	}

	return S;
}

/*int main()
{
	int nn;

	scanf("%d",&nn);

	cout << guess_sequence( nn ) << endl;
}*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:61:28: 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(press(S + remain[h]) == S.size() + 1)
      |       ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
combo.cpp:69:15: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   69 |   if(S.size() == g)
      |      ~~~~~~~~~^~~~
combo.cpp:55:7: warning: unused variable 'cnt' [-Wunused-variable]
   55 |   int cnt = 0;
      |       ^~~
combo.cpp: In function 'int getInd(char)':
combo.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type]
   17 | }
      | ^
combo.cpp: In function 'int press(std::string)':
combo.cpp:24:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |  scanf("%d",&a);
      |  ~~~~~^~~~~~~~~
/usr/bin/ld: /tmp/ccBU5gJ0.o: in function `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
grader.cpp:(.text+0x0): multiple definition of `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'; /tmp/cccTAOpY.o:combo.cpp:(.text+0x100): first defined here
collect2: error: ld returned 1 exit status