int* create_tab(int tab[], unsigned tab_size);
void free_tab(int tab[]);
int* concat_tab(int tab1[], unsigned tab_size1, int tab2[], unsigned tab_size2);
int* create_tab(int tab[], unsigned tab_size);
void free_tab(int tab[]);
int* concat_tab(int tab1[], unsigned tab_size1, int tab2[], unsigned tab_size2);