# SQ.py computes a square root of a nonnegative int.
# input: a nonnegative int
# output: a nonnegative square root
import math
num = int(raw_input("Type an int: "))
if (num >= 0) :
# we do these commands when the question has answer, True:
answer = math.sqrt(num)
print answer
print # a blank line
raw_input("press Enter to finish")