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Two strings are anagrams of each other if the letters of one string can be rearranged to form the other string. Given a string, find the number of pairs of substrings of the string that are anagrams of each other.

Example

The list of all anagrammatic pairs is at positions respectively.

Function Description

Complete the function sherlockAndAnagrams in the editor below.

sherlockAndAnagrams has the following parameter(s):

  • string s: a string

Returns

  • int: the number of unordered anagrammatic pairs of substrings in

Input Format

The first line contains an integer , the number of queries.
Each of the next lines contains a string to analyze.

Constraints



contains only lowercase letters in the range ascii[a-z].

Sample Input 0

2
abba
abcd

Sample Output 0

4
0

Explanation 0

The list of all anagrammatic pairs is and at positions and respectively.

No anagrammatic pairs exist in the second query as no character repeats.

Sample Input 1

2
ifailuhkqq
kkkk

Sample Output 1

3
10

Explanation 1

For the first query, we have anagram pairs and at positions and respectively.

For the second query:
There are 6 anagrams of the form at positions and .
There are 3 anagrams of the form at positions and .
There is 1 anagram of the form at position .

Sample Input 2

1
cdcd

Sample Output 2

5

Explanation 2

There are two anagrammatic pairs of length : and .
There are three anagrammatic pairs of length : at positions respectively.

Limbajul de programare folosit: python3

Cod:

#!/bin/python3

from collections import Counter

def sherlockAndAnagrams(s):
    cnt = Counter()
    n = len(s)
    for i in range(n):
        freq = [0] * 26
        for j in range(i, n):
            freq[ord(s[j]) - 97] += 1
            cnt[tuple(freq)] += 1
    ans = 0
    for c in cnt.values():
        ans += c * (c - 1) // 2
    return ans

if __name__ == '__main__':
    q = int(input().strip())
    out = []
    for _ in range(q):
        out.append(str(sherlockAndAnagrams(input().strip())))
    print(*out, sep='\n')

Scor obtinut: 1.0

Submission ID: 464591379

Link challenge: https://www.hackerrank.com/challenges/sherlock-and-anagrams/problem

Sherlock and Anagrams