Submission #807419

#	Time	Username	Problem	Language	Result	Execution time	Memory
807419		OAleksa	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
//#include "combo.h"
#define f first
#define s second
using namespace std; 
int press(string p) {
	cout << p << endl;
	int x;
	cin >> x;
	return x;
}


string guess_sequence(int N) {
	string s;
	if(N == 1) {
		if(press("A"))
			return "A";
		else if(press("B"))
			return "B";
		else if(press("X"))
			return "X";
		else
			return "Y";
	}
	if(press("AB")) {
		if(press("A"))
			s += "A";
		else
			s += "B";
	}
	else {
		if(press("X"))
			s += "X";
		else
			s += "Y";
	}
	for(int i = 1;i < N - 1;i++) {
		if(s[0] == 'A') {
			int x = press(s + "BB" + s + "BX" + s + "BY" + s + "Y");
			if(x == i)
				s += "X";
			else if(x == i + 1)
				s += "Y";
			else
				s += "B";
		}
		else if(s[0] == 'B') {
			int x = press(s + "AA" + s + "AX" + s + "AY" + s + "Y");
			if(x == i)
				s += "X";
			else if(x == i + 1)
				s += "Y";
			else
				s += "A";
		}
		else if(s[0] == 'X') {
			int x = press(s + "AA" + s + "AB" + s + "AY" + s + "Y");
			if(x == i)
				s += "B";
			else if(x == i + 1)
				s += "Y";
			else
				s += "A";
		}
		else {
			int x = press(s + "AA" + s + "AB" + s + "AX" + s + "X");
			if(x == i)
				s += "B";
			else if(x == i + 1)
				s += "X";
			else
				s += "A";
		}
	}
	int k = s.size();
	if(s[0] == 'A') {
		if(press(s + "B") > k)
			s += "B";
		else if(press(s + "X") > k)
			s += "X";
		else
			s += "Y";
	}
	else if(s[0] == 'B') {
		if(press(s + "A") > k)
			s += "A";
		else if(press(s + "X") > k)
			s += "X";
		else
			s += "Y";
	}
	else if(s[0] == 'X') {
		if(press(s + "A") > k)
			s += "A";
		else if(press(s + "B") > k)
			s += "B";
		else
			s += "Y";
	}
	else {
		if(press(s + "B") > k)
			s += "B";
		else if(press(s + "X") > k)
			s += "X";
		else
			s += "A";
	}
	return s;
}


int main()
{
	  ios_base::sync_with_stdio(false);
	  cin.tie(0);
	  cout.tie(0);
	  int tt = 1;
		//cin >> tt;
	  while(tt--) {
			int n;
			cin >> n;
			cout << guess_sequence(n) << endl;
		}
    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccCBEnsc.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/ccaLh8tb.o:combo.cpp:(.text+0x0): first defined here
/usr/bin/ld: /tmp/ccCBEnsc.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccaLh8tb.o:combo.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status