Ninja Castle

A room with Jonin and Ninto has the way out. Its the middle door. Unfortunately there are 2 rooms with those ninja.

Actually I think there are 3

I notice going into center doors over and over will just put you back in the previous room i.e.

A center --> B
B center --> A
etc

Just keep going through random rooms until you get jounins/nintos and enter the center door. A trick I do is kill stuff on that map so I see ETCs lying on the ground. If i got the wrong room and i re-enter another ninto room and I see my ETCs, i pick a diff door

Edit: Btw there is no shortest way out because you get teleported into any of the rooms randomly. And since some rooms look identical, there's no way to figure it out. There's probably some pathway but I find going through random doors and using my above strategy is the quickest. At most it takes me a minute.