##Minkolang 0.10, 13 bytes
Minkolang 0.10, 13 bytes
"66*2-n,?r$O. This is exactly like the standard quine except for these four characters: n,?r. n takes an integer from input, , inverts it, so ? skips r if the input is truthy. Otherwise, r reverses the stack so that it is output in reverse order.