Compilare: main.cpp: In function 'int main()': main.cpp:17:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2, lung = 0; i < cuv.size(); i++) ~~^~~~~~~~~~~~ main.cpp:28:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1, lung = 0; i < sir.size(); i++) ~~^~~~~~~~~~~~ main.cpp:36:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(lung == cuv.size() - 1) ~~~~~^~~~~~~~~~~~~~~~~