Hey Naveen, You have scored 70 percentile in JEE MAINS. With this marks there are less chances of being getting admission into HPTU under government college as cutoffs for government colleges are very high this year. You can try for any other branch than Computer Science. You can check the new cutoffs available for the college at college website or at counselling and you can check according to your seats. Even you can check your colleges that are best available for you at this rank at JEE MAINS College Predictor and it will be really helpful for you while getting to know about your colleges and you can choose the best one according to you.

Hope it will help you.

Good Luck