We need more algorithms, data structures or puzzles

[ZoranPandovski]

Just make new PR with algorithm, data structures or puzzle implementation. Language doesn't matter.
Follow the structure : https://github.com/ZoranPandovski/al-go-rithms#contribution.

[akshay326]

Add algorithms for large(gcd, exponentiation, primality check) numbers in python, #436

[amankh99]

@ZoranPandovski , for levenshtein distance we have one more implementation which is space efficient. One is of O(m*n) space complexity which have already been added and one is of O(min(m, n)) space complexity, here m,n are length of two strings. Please assign me to add space efficient version.