69. Sqrt\(x\)
class Solution:
def mySqrt(self, x: int) -> int:
if x == 1:
return 1
left = 1
right = x // 2
while left <= right:
mid = left + (right - left) // 2
num = mid * mid
if num == x:
return mid
elif num < x:
left = mid + 1
elif num > x:
right = mid - 1
return right