#include<iostream>

int * extraitpairs ( int * tab, int taille, int * taillenew) {
  *taillenew=0;
  for (int i = 0; i < taille; i ++){
    *taillenew += tab[i]%2==0? 1 : 0;
  }
  int * tabnew = new int[*taillenew];
  int j=0;
  for ( int i =0; i < *taillenew; i ++ ){
    while ( tab[j] % 2!=0){
      j ++;
    }
    tabnew[i]= tab[j];
    j++;
  }
  return tabnew;
}

void affichetab ( int  *P,  int taille) {
std::cout<<"[";
for ( int i =0; i <taille ; i++){
	std::cout<<P[i];
	if (i != (taille-1)) std::cout<<",";
}
std::cout<<"]"<<std::endl;
}

int main (){
  int tmp;
  int *T = new int[4];
  for (int i=0; i<4; i ++){
    T[i]= i == 0 ? 1: T[i-1]+1;
  }
  int *tabrslt;
  tabrslt=extraitpairs(T,4,&tmp);
  affichetab(T,4);
  affichetab(tabrslt,tmp);
  return 0;
}