sqrtx

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69. Sqrt(x) (Easy)

Implement int sqrt(int x).

Compute and return the square root of x, where x is guaranteed to be a non-negative integer.

Since the return type is an integer, the decimal digits are truncated and only the integer part of the result is returned.

Example 1:

Input: 4
Output: 2

Example 2:

Input: 8
Output: 2
Explanation: The square root of 8 is 2.82842..., and since 
             the decimal part is truncated, 2 is returned.

Related Topics

[Math] [Binary Search]

Similar Questions

1. Pow(x, n) (Medium)
2. Valid Perfect Square (Easy)

Hints

Hint 1

Try exploring all integers. (Credits: @annujoshi)

Hint 2

Use the sorted property of integers to reduced the search space. (Credits: @annujoshi)