Compilare: user.cpp: In function ‘void bfs(int, int)’: user.cpp:32:15: warning: unused variable ‘c’ [-Wunused-variable] int k,a,b,c; ^ user.cpp: In function ‘int main()’: user.cpp:58:30: warning: variable ‘b22’ set but not used [-Wunused-but-set-variable] int i,j,a1,a2,a3,b12,b13,b22,b23,d11,d13,d21,d23; ^ user.cpp:58:46: warning: variable ‘d21’ set but not used [-Wunused-but-set-variable] int i,j,a1,a2,a3,b12,b13,b22,b23,d11,d13,d21,d23; ^ user.cpp:100:46: warning: ‘d23’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(a1 && a2 && d23) dis2=min(dis2,2*a1+a2+d23-3); ^