Compilare: main.cpp: In function 'int main()': main.cpp:36:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = poz; i < vec.size(); i++) ~~^~~~~~~~~~~~ main.cpp: In function 'int cat(int)': main.cpp:11:38: warning: 'rz' may be used uninitialized in this function [-Wmaybe-uninitialized] int st = 0, dr = vec.size() - 1, rz; ^~