Compilare: user.cpp: In function ‘void BFS(long int, long int&)’: user.cpp:40:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i<coada.size()) ^ user.cpp:42:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (long j=0;j<graf[coada[i]].size();j++) ^ user.cpp: In function ‘void BFS(long int, long int, long int&)’: user.cpp:64:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i<coada.size()) ^ user.cpp:66:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (long j=0;j<graf[coada[i]].size();j++) ^ user.cpp:60:10: warning: unused variable ‘gasit’ [-Wunused-variable] bool gasit=false; ^