Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:31:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<graf[element].size(); i++) ^ user.cpp:20:19: warning: unused variable ‘j’ [-Wunused-variable] int i,element,j=1,t=0,s=0; ^ user.cpp:20:23: warning: unused variable ‘t’ [-Wunused-variable] int i,element,j=1,t=0,s=0; ^ user.cpp:20:27: warning: unused variable ‘s’ [-Wunused-variable] int i,element,j=1,t=0,s=0; ^ user.cpp: In function ‘int main()’: user.cpp:63:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<distanta.size();i++) ^