Biginteger square root

Question

I want to find square root of this number: 959817850218812
but i am getting 1 as an output.. can any one help??

https://code.sololearn.com/c2Hh7ZA5F2sv

input Format:
First line will contain T = number of test case, next T lines will contains a positive integer n.

Answer 1

tysm FF9900 :)

Answer 2

Hi FF9900, i want to do this program without using sqrt() . you can review my code and suggest me changes