This nifty piece of obfuscated C was mentioned in a recent Slashdot thread. It’ arranged to spell the word "maze"; it is itself a valid maze, with the "–" decrement operators acting as the entrance and exit; and when compiled with gcc’s -fwritable-strings option it will generate a maze of any length. People with this much time on their hands deserve our respect.
char*M,A,Z,E=40,J[40],T[40];main(C){for(*J=A=scanf(M="%d",&C); -- E; J[ E] =T [E ]= E) printf("._"); for(;(A-=Z=!Z) || (printf("\n|" ) , A = 39 ,C -- ) ; Z || printf (M ))M[Z]=Z[A-(E =A[J-Z])&&!C & A == T[ A] |6<<27<rand()||!C&!Z?J[T[E]=T[A]]=E,J[T[A]=A-Z]=A,"_.":" |"];}