Hi , at 31k rank yo will definetly get assured seat in SGSITS INDORE as its last year intake rank is around 90 k for CSE department.

Considering your rank you there is a fair chance that you can get into some good colleges so i will suggest you to go for top government colleges first. So don't missout the registration process. Do participate in the counselling.I am here providing you some colleges where you can apply first:

     NIT mizzoram,Sikkim, IIIT Manipur ,  IIIT Pune,   IIIT Nagpur,   IIIT Ranchi,   IIIT Surat ,IIIT BhopaL,   IIIT Bhagalpur  ,COEP pune ,DTU,NIST, BIT ranchi, BIT sindri,BIT patna.

hope it will help you. FOR MORE QUERY COMMENT BELOW AND UPVOTE :)