Added Binary Search Approach

https://leetcode.com/problems/pairs-of-songs-with-total-durations-divisible-by-60/

https://leetcode.com/problems/excel-sheet-column-number/

https://leetcode.com/problems/island-perimeter/

1047. Remove All Adjacent Duplicates In String

Rectangles Overlap

Find Subsequence of Length K With the Largest Sum

Added Brute Force and Optimized solution

Added leetcode url

Initial commit