Compilare: main.cpp: In function 'int main()': main.cpp:74:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i<sir.size(); i++) ~^~~~~~~~~~~ main.cpp:95:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i<sir.size(); i++) ~^~~~~~~~~~~