Compilare: main.cpp: In function 'void extindere(int)': main.cpp:16:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (poz - lung[poz] >= 0 && poz + lung[poz] < sir.size() && sir[poz + lung[poz]] == sir[poz - lung[poz]]) ~~~~~~~~~~~~~~~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:32:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < input.size(); i++) ~~^~~~~~~~~~~~~~ main.cpp:39:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < sir.size(); i++) ~~^~~~~~~~~~~~