#include<vector>
#include<cstdio>
#include<set>
#include<cstdlib>
#include<cstdarg>
#include<cassert>
using namespace std;
#include "communication.h"
/*
void __attribute__((noreturn)) __attribute__((format(printf, 1, 2))) result(const char *msg, ...)
{
va_list args;
va_start(args, msg);
vfprintf(stdout, msg, args);
fprintf(stdout, "\n");
va_end(args);
exit(0);
}
namespace
{
enum { ENCODE, DECODE } current_phase;
int N, X;
vector<int> signals;
size_t cursor = 0;
bool flipped = false;
}
int send(int s)
{
if(current_phase == DECODE or (s != 0 and s != 1))
result("Invalid send.");
printf("send(%d) -> ", s); fflush(stdout);
int answer;
if(scanf("%d", &answer) != 1 or (answer != 0 and answer != 1))
result("Invalid reply to send.");
bool flipped_now = (s != answer);
if(flipped and flipped_now)
result("Invalid reply to send");
flipped = flipped_now;
signals.push_back(answer);
if(signals.size() > (size_t) 250)
result("Looks (and smells) fishy.");
return signals.back();
}
int receive()
{
if(current_phase == ENCODE) result("Invalid receive.");
if(cursor >= signals.size()) result("Assistant waiting for Godot.");
int r = signals[cursor++];
printf("receive() -> %d\n", r);
return r;
}
*/
void encode(int N, int x) {
if (x == 1) {
int a = send(0), b = send(0);
while (a or b) a = b, b = send(0);
} else {
int a = send(1), b = send(1);
while (!a or !b) a = b, b = send(1);
}
}
pair<int, int> decode(int N) {
int a = receive(), b = receive();
while ((a and !b) or (!a and b)) a = b, b = receive();
if (a and b) return {2, 3};
else return {1, 2};
}
/*
int main()
{
if(scanf("%d %d", &N, &X) != 2 or X < 1 or X > N)
result("Invalid input.");
current_phase = ENCODE;
encode(N, X);
current_phase = DECODE;
auto r = decode(N);
if(r.first < 1 or r.first > N or r.second < 1 or r.second > N)
result("Invalid answer.");
if(r.first == X or r.second == X)
result("Correct: %d signals sent.", (int) signals.size());
else
result("Wrong answer.");
}
*/
