Added solution to 0069_sqrt(x)

LeetCode/0069 _ Sqrt(x).py

@@ -0,0 +1,17 @@
+class Solution(object):
+ def mySqrt(self, x):
+ if x<2:
+ return x
+ low = 0
+ high = x
+ result=0
+ while(low<=high):
+ mid = (low+high)//2
+ if(mid*mid==x):
+ return mid
+ elif(mid*mid<x):
+ low = mid+1
+ result = mid
+ else:
+ high = mid-1
+ return result