CSE branch is most demanding branch in engineering colleges so cut off is always high for this branch. you can get CSE branch in lower NITs like Mizoram, Manipur, Nagaland Etc. at 130-145 score. To get CSE branch in top NITs like Warangal, Surathgal, Trichi, your score should be more than 250 in JEE Main.

Good Luck.