Is Second Array Mirror Inverse Of First Array

[S18LPC-OL0010 (Preesh Tiwari)]

https://ide.codingblocks.com/#/s/14728
https://hack.codingblocks.com/contests/c/474/205

Test case number 3 failed. I guess I am reversing the array instead of inverting it. Can you help

[S18LPC-OL0030 (Akriti Anand)]

Hint: what inverse here means is arr[arr[i]] = i
Hope it helped

[S18LPC-OL0010 (Preesh Tiwari)]

you mean a1[a1[i]] = i