Compilare: main.cpp: In function 'int main()': main.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ene.size(); i++) ~~^~~~~~~~~~~~ main.cpp:46:6: warning: statement has no effect [-Wunused-value] g<<answer; ~^~~~~~~~ main.cpp:48:9: warning: left shift count is negative [-Wshift-count-negative] g<<-1; ^ main.cpp:48:6: warning: statement has no effect [-Wunused-value] g<<-1; ~^~~~