#include <utility>
#include <bits/stdc++.h>
using namespace std;
/**
* use this function in encode when you want to send a certain signal
* (it might come out wrong, and the return value tells you which signal
* was actually sent)
*/
int send(int);
/**
* use this function in decode; it returns the next signal that was actually
* sent during the corresponding call of encode
*/
int receive();
/**
* implement these two functions yourself
*/
void encode(int N, int X){
for(int j = 0; j < 2; ++j){
for(int k = 0; k < 5; ++k){
send(((1<<j)&X)>0);
}
}
}
std::pair<int, int> decode(int N) {
int a = 0;
for(int j = 0; j < 2; ++j){
int x = 0, y = 0;
for(int k = 0; k < 5; ++k){
bool b = receive();
x += b;
y += !b;
}
if(x>y) a += (1<<j);
}
return {a, a};
}
