-int concat_tab(int tab1[], unsigned tab_size1, int tab2[], unsigned tab_size2, int tab_dest[]);
-int resize_tab(int tab[], unsigned tab_size);
-int count_tab_element(int tab[], unsigned tab_size, int element);
+int* concat_tab(int tab1[], unsigned tab_size1, int tab2[], unsigned tab_size2);
+int* resize_tab(int tab[], unsigned tab_size);
+unsigned count_tab_element(int tab[], unsigned tab_size, int element);
+unsigned count_tab_criteria(int tab[], unsigned tab_size, count_criteria_cb c_criteria);