Compilare: main.cpp: In function 'int main()': main.cpp:120:33: warning: comparison of integer expressions of different signedness: 'std::stack<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 120 | while(merges.size() > init) undo(); | ~~~~~~~~~~~~~~^~~~~~ main.cpp:115:38: warning: 'poz' may be used uninitialized [-Wmaybe-uninitialized] 115 | if(cnt[ find_father(poz) ] == ce_trebe){ | ~~~~~~~~~~~~~~~~~~~~~~^ main.cpp:58:13: note: 'poz' was declared here 58 | int poz; | ^~~