After the closure of registrations for the ICPC India 2022 regionals, I have computed the count of distinct colleges participating in the regionals.

Amritapuri:...

2022

Total Registrations — 1245

Slots — 130

Unique Colleges — 269

2021

Total Registrations — 1464

Slots — 160

Unique Colleges — 247

Mathura:...

I will provide an update once the data becomes available as it is currently unavailable.