4. A palindrome is a character string that reads the same from left to right as it does from right to left. For example, M99M is a length 4 palindrome, and H@YYY@H is a length 7 palindrome. Let n be any positive odd integer. Construct a formula in terms of n that gives the total number of length-n palindromes that can be formed using characters from a set that contains fifty different symbols. Explain your answer.
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There are a total of 2,147,483,648 (2147483648) palindromes Show more…
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A palindrome is a string that reads the same from the left and from the right. For example, "mom" and "tacocat" are palindromes, as are any single-character strings. Given a string, determine the number of its substrings that are palindromes. Example: The string is s = "tacocat". Palindromic substrings are ["t", "a", "c", "o", "c", "a", "t", "coc", "acoca", "tacocat"]. There are 10 palindromic substrings. Function Description: Complete the countPalindromes function in the editor. countPalindromes has the following parameter: - string s: the string to analyze Returns: - int: an integer that represents the number of palindromic substrings in the given string Constraints: - 1 <= |s| <= 5x10^3 - Each character of s[i] is in the range 'a' to 'z'
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A palindrome is an integer that reads the same forwards as backwards. For example, 12321 is a palindrome and 12322 is not a palindrome. Determine the number of palindromes between 10 000 and 100 000 that are divisible by 15.
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