Lexicographic rank of string

We will see what is the rank of the string in lexicographic order, for the words which can be made using all the characters of the given string and calculate using a string algorithm.

What is lexicographic rank of the string??

Suppose, we are given a string "BAR" and we need to find its lexicographic rank then, what we can do is write down all the lexicographic permutations of that string and then, the position at which this string "BAR" appears will be the lexicographic rank of that string.

For...