Lexicographic Permutation Rank Problem Statement

Given a distinct string, determine the lexicographic permutation rank of the string.

Example:

Input:

T = 2
S = "abc"
S = "bac"

Output:

1
2

Explanation:

For the first test case, "abc" is already the smallest permutation hence rank 1. In the second, "bac" is the second permutation in lexicographic order, hence rank 2.

Constraints:

1

Question

Lexicographic Permutation Rank Problem Statement

Given a distinct string, determine the lexicographic permutation rank of the string.

Example:

Input:

T = 2
S = "abc"
S = "bac"

Output:

1
2

Explanation:

For the first test case, "abc" is already the smallest permutation hence rank 1. In the second, "bac" is the second permutation in lexicographic order, hence rank 2.

Constraints:

1 <= T <= 25
1 <= |S| <= 20
'a' <= S[i] <= 'z'

Note: Implement the function to solve the problem, no need to handle input/output.

Accepted Answer

The problem involves determining the lexicographic permutation rank of a distinct string.

Iterate through all permutations of the string and compare with the given string to determine the rank.
Use a recursive function to generate all permutations of the string.
Keep track of the count of permutations smaller than the given string to determine the rank.