Compilare: user.cpp: In function ‘int BFS()’: user.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();++i) { ^ user.cpp: In function ‘int main()’: user.cpp:50:12: warning: unused variable ‘x’ [-Wunused-variable] int n,i,j,x,y,q,m=0,fmin,p; ^ user.cpp:50:14: warning: unused variable ‘y’ [-Wunused-variable] int n,i,j,x,y,q,m=0,fmin,p; ^ user.cpp:50:16: warning: unused variable ‘q’ [-Wunused-variable] int n,i,j,x,y,q,m=0,fmin,p; ^ user.cpp:50:22: warning: unused variable ‘fmin’ [-Wunused-variable] int n,i,j,x,y,q,m=0,fmin,p; ^