Compilare: user.cpp: In function ‘int main()’: user.cpp:90:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < graf[a].size(); i++) ^ user.cpp:179:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int g = 0; g < graf[elozo[i]].size(); g++) ^ user.cpp:188:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int g = 0; g < energia.size(); g++) ^