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Binary Search (BS) is, arguably, the most popular question in coding interviews. Even when you see that a problem can be solved with BS, it can be tricky to handle all of the indexes and base cases in the solution. What if there was an approach that could work for all BS problems? 
This course was designed from scratch with this one goal in mind. We'll explore one technique that can handle any BS problem. The practice problems in this course were carefully chosen to cover the most frequently asked BS questions in coding interviews. At the end of this course, you will feel confident to handle BS questions during phone or on-site interviews, as well as with all of the follow-ups about its time and space complexity.

Binary Search for Coding Interviews

## Problem statement

Suppose we are given an integer `a`. Compute and return the square root of `a`. If `a` is not a perfect square, we will truncate the decimal digits.

**Constraints:** 

- $0 \leq a \leq 10^3$

**Example 1:**
```
Input: 11    
Output: 3    
```
**Explanation:** The square root of `11` is `3.3166...` and since the decimal part is truncated, `3` is returned.

**Example 2:**
```
Input: 9    
Output: 3    
```
**Explanation:** `9` gives a perfect square root.

# Problem statement

Suppose we are given an integer `a`. Compute and return the square root of `a`. If `a` is not a perfect square, we will truncate the decimal digits.

**Constraints:** 

- $0 \leq a \leq 10^3$

**Example 1:**
```
Input: 11    
Output: 3    
```
**Explanation:** The square root of `11` is `3.3166...` and since the decimal part is truncated, `3` is returned.

**Example 2:**
```
Input: 9    
Output: 3    
```
**Explanation:** `9` gives a perfect square root.

Let's try to solve one problem with different inputs.

Difficulty Level: Easy

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Square Root of Integer

Problem statement