Compilare: main.cpp: In function 'int main()': main.cpp:50:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < romeo.size(); i++) { ~~^~~~~~~~~~~~~~ main.cpp:68:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < julieta.size(); i++) { ~~^~~~~~~~~~~~~~~~