Problem description for sqrtx

leetcode/sqrtx/Readme.md

@@ -0,0 +1,31 @@
+Given a non-negative integer x, return the square root of x rounded down to the nearest integer. The returned integer should be non-negative as well.
+
+You must not use any built-in exponent function or operator.
+
+
+	For example, do not use pow(x, 0.5) in c++ or x ** 0.5 in python.
+
+
+ 
+Example 1:
+
+
+Input: x = 4
+Output: 2
+Explanation: The square root of 4 is 2, so we return 2.
+
+
+Example 2:
+
+
+Input: x = 8
+Output: 2
+Explanation: The square root of 8 is 2.82842..., and since we round it down to the nearest integer, 2 is returned.
+
+
+ 
+Constraints:
+
+
+	0 <= x <= 231 - 1
+