Geeksforgeeks

Error

Given a sorted array **arr**[] of size **N** without duplicates, and given a value **x**. Floor of x is defined as the largest element **K** in arr[] such that K is smaller than or equal to x. Find the index of K(0-based indexing).

**Example 1:**

**Input:
**N = 7, x = 0
arr[] = {1,2,8,10,11,12,19}
**Output: **-1**
Explanation: **No element less
than 0 is found. So output
is "**-1**".

**Example 2:**

**Input:
**N = 7, x = 5
arr[] = {1,2,8,10,11,12,19}
**Output: **1**
Explanation: **Largest Number less than 5 is
**2 (i.e K = 2)**, whose index is **1**(0-based
indexing).

**Your Task:**

The task is to complete the function **findFloor**() which returns an integer denoting the index value of K or return **-1** if there isn't any such number.

**Expected Time Complexity:** O(log N).

**Expected Auxiliary Space:** O(1).

**Constraints:**

1 ≤ N ≤ 10^{7}

1 ≤ arr[i] ≤ 10^{18}

0 ≤ X ≤^{ }arr[n-1]

We are replacing the old Disqus forum with the new Discussions section given below.

Click here to view old Disqus comments.

Click here to view old Disqus comments.

Login to report an issue on this page.

We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?

YesLoading...

Floor in a Sorted Array

...