#include<bits/stdc++.h>
#include"encoder.h"
#include"encoderlib.h"
using namespace std;
/*
Strategy:
*) Encoder:
Encoder will send the following number: xxxxxyyz
xxxxx is the index of the number in the original message
yy is which quarter of the message we're sending (33221100)
z is true if the left bit of this quarter is 1, otherwise the right bit of this quarter is 1
This encoder will send at most 8*N messages of length 8
*) Decoder:
Decoder will take the given numbers xxxxxyyz and create an array with the original message
*/
void sendValue( int i, int q, int Mi ){
int rv = i;
rv <<= 2;
rv |= q;
rv <<= 1;
int _Mi = 0;
if( q == 0 ) _Mi |= ( ( Mi & (1<<1) ) | ( Mi & (1<<0) ) ) >> 0;
if( q == 1 ) _Mi |= ( ( Mi & (1<<3) ) | ( Mi & (1<<2) ) ) >> 2;
if( q == 2 ) _Mi |= ( ( Mi & (1<<5) ) | ( Mi & (1<<4) ) ) >> 4;
if( q == 3 ) _Mi |= ( ( Mi & (1<<7) ) | ( Mi & (1<<6) ) ) >> 6;
if( _Mi & 1 ) send( rv | 0 );
if( _Mi & 2 ) send( rv | 1 );
}
void encode( int N, int M[] ){
for( int i = 0 ; i < N ; i++ ){
for( int q = 0 ; q < 4 ; q++ ) sendValue( i, q, M[i] );
}
}
#include<bits/stdc++.h>
#include"decoder.h"
#include"decoderlib.h"
using namespace std;
/*
Strategy:
*) Encoder:
Encoder will send the following number: xxxxxyyz
xxxxx is the index of the number in the original message
yy is which quarter of the message we're sending (33221100)
z is true if the left bit of this quarter is 1, otherwise the right bit of this quarter is 1
This encoder will send at most 8*N messages of length 8
*) Decoder:
Decoder will take the given numbers xxxxxyyz and create an array with the original message
*/
void recieveValue( int Xi, int &x, int &y, int &z ){
z = Xi & (0b1);
Xi >>= 1;
y = Xi & (0b11);
Xi >>= 2;
x = Xi;
}
void decode( int N, int L, int X[] ){
int A[N]; for( int &i : A ) i = 0;
int x, y, z;
for( int i = 0 ; i < L ; i++ ){
recieveValue( X[i], x, y, z );
A[x] |= ( ( z ? 0b10 : 0b01 ) ) << (2*y);
}
for( int i = 0 ; i < N ; i++ ) output(A[i]);
}
