#include "encoder.h"
#include "encoderlib.h"
void encode(int N, int M[])
{
if(N<=32){
//binary system
for(int num=0;num<N;num++){
int pos=0;
while(M[num]>0){
if(M[num]&1){
send((num<<3)|pos);
}
M[num]>>=1;
pos++;
}
}
}else{
//4-ary system
for(int num=0;num<N;num++){
int pos=0;
while(M[num]>0){
int cnt=M[num]&3;//mod4=mod(2^2), we keep last 2 digits
if(cnt>=1){
send((num<<2)|pos);
}if(cnt>=2){
send((num<<2)|pos);
}if(cnt==3){
send((num<<2)|pos);
}
M[num]>>=2;
pos++;
}
}
}
}
#include "decoder.h"
#include "decoderlib.h"
#include <bits/stdc++.h>
using namespace std;
void decode(int N, int L, int X[])
{
map<int,int> freq;
for(int i=0;i<L;i++){
freq[X[i]]++;
}
if(N<=32){
//binary system
for(int num=0;num<N;num++){
int val=0;
for(int pos=0;pos<8;pos++){
int mask=(num<<3)|pos;
if(freq.count(mask)){
val|=(1<<pos);
}
}
output(val);
}
}else{
//4-ary system
for(int num=0;num<N;num++){
int val=0;
for(int pos=0;pos<4;pos++){
int mask=(num<<2)|pos;
if(freq.count(mask)){
val|=(1<<(2*pos))*freq[mask];
}
}
output(val);
}
}
}
