Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
inversePermutation[3, 8, 5, 10, 9, 4, 6, 1, 7, 2]
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random