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ambitious

Count the palindromic subwords of given string.

Programming language:
Spoken language:

In this problem we consider only strings consisting of lower-case English letters (a−z).

A string is a *palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

Given a string S of length N, a *slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

int solution(char *S);

that, given a string S of length N letters, returns the number of palindromic slices of S. The function should return −1 if this number is greater than 100,000,000.

For example, for string S = `baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);
- expected worst-case space complexity is O(N) (not counting the storage required for input arguments).

Copyright 2009–2018 by Codility Limited. All Rights Reserved. Unauthorized copying, publication or disclosure prohibited.

In this problem we consider only strings consisting of lower-case English letters (a−z).

A string is a *palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

Given a string S of length N, a *slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

int solution(string &S);

that, given a string S of length N letters, returns the number of palindromic slices of S. The function should return −1 if this number is greater than 100,000,000.

For example, for string S = `baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);
- expected worst-case space complexity is O(N) (not counting the storage required for input arguments).

Copyright 2009–2018 by Codility Limited. All Rights Reserved. Unauthorized copying, publication or disclosure prohibited.

In this problem we consider only strings consisting of lower-case English letters (a−z).

A string is a *palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

Given a string S of length N, a *slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

class Solution { public int solution(string S); }

that, given a string S of length N letters, returns the number of palindromic slices of S. The function should return −1 if this number is greater than 100,000,000.

For example, for string S = `baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);
- expected worst-case space complexity is O(N) (not counting the storage required for input arguments).

Copyright 2009–2018 by Codility Limited. All Rights Reserved. Unauthorized copying, publication or disclosure prohibited.

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

func Solution(S string) int

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

class Solution { public int solution(String S); }

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

function solution(S);

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

function solution(S)

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

int solution(NSString *S);

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

function solution(S: PChar): longint;

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

function solution($S);

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

sub solution { my ($S)=@_; ... }

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

def solution(S)

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

def solution(s)

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

object Solution { def solution(s: String): Int }

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

public func solution(inout S : String) -> Int

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

public func solution(_ S : inout String) -> Int

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

In this problem we consider only strings consisting of lower-case English letters (a−z).

*palindrome* if it reads exactly the same from left to right as it does from right to left. For example, these strings are palindromes:

azaabbaabacaba

These strings are not palindromes:

zazaabcdabacada

*slice* of S is a substring of S specified by a pair of integers (p, q), such that 0 ≤ p < q < N. A slice (p, q) of string S is *palindromic* if the string consisting of letters S[p], S[p+1], ..., S[q] is a palindrome. For example, in a string S = `abbacada`:

- slice (0, 3) is palindromic because
abbais a palindrome,- slice (6, 7) is not palindromic because
dais not a palindrome,- slice (2, 5) is not palindromic because
bacais not a palindrome,- slice (1, 2) is palindromic because
bbis a palindrome.

Write a function

Private Function solution(S As String) As Integer

`baababa` the function should return 6, because exactly six of its slices are palindromic; namely: (0, 3), (1, 2), (2, 4), (2, 6), (3, 5), (4, 6).

Assume that:

- N is an integer within the range [0..20,000];
- string S consists only of lowercase letters (
a−z).

Complexity:

- expected worst-case time complexity is O(N);

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