Compilare: user.cpp: In function ‘int bfs()’: user.cpp:13:31: warning: unused variable ‘add’ [-Wunused-variable] int start,finish,a,i,node,add; ^ user.cpp: In function ‘int main()’: user.cpp:42:13: warning: unused variable ‘j’ [-Wunused-variable] int m,i,j,x,y,a,b,c,add,node,maxflow=0; ^ user.cpp:42:21: warning: unused variable ‘b’ [-Wunused-variable] int m,i,j,x,y,a,b,c,add,node,maxflow=0; ^