Paper boat!

Check out this strategy of mine!
Strategy:
Start from 1 and 2 in first day,
go to 3 and 4 on the second day,
5 and 6 on the following day and so on..
Worst case scenario:
Assume thief is in 13th cave. In the worst case, thief will always move behind you. Good news is you can move 2 steps, he can move just one step. At most you need 12 days to find the thief. 🙂

Woman will choose one chit and tells she will do the opposite of what is there in the other chit.

He reached his destination.

Because the fisherman couldn’t find any fish at all. Fisherman killed cody’s friend and brought his flesh as fish. Cody without knowing ate it. One fine day, when he ate salmon from an ordinary restaurant, he realized that the flesh he ate other day on the island did not taste the same. Finally, when he figured this out, he killed himself.