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You are given a string s and an integer k. Encrypt the string using the following algorithm:For each character c in s, replace c with the kth character after c in the string (in a cyclic manner).Return the encrypted string. Example 1:Input: s = "dart", k = 3Output: "tdar"Explanation:For i = 0, the 3rd character after 'd' is 't'.For i = 1, the 3rd character after 'a' is 'd'.For i = 2, the 3rd character after 'r' is 'a'.For i = 3, the 3rd character after 't' is 'r'.Example 2:Input: s = "aaa", k = 1Output: "aaa"Explanation:As all the characters are the same, the encrypted string will also be the same. Constraints:1 <= s.length <= 1001 <= k <= 104s consists only of lowercase English letters.

Question

You are given a string s and an integer k. Encrypt the string using the following algorithm:For each character c in s, replace c with the kth character after c in the string (in a cyclic manner).Return the encrypted string. Example 1:Input: s = "dart", k = 3Output: "tdar"Explanation:For i = 0, the 3rd character after 'd' is 't'.For i = 1, the 3rd character after 'a' is 'd'.For i = 2, the 3rd character after 'r' is 'a'.For i = 3, the 3rd character after 't' is 'r'.Example 2:Input: s = "aaa", k = 1Output: "aaa"Explanation:As all the characters are the same, the encrypted string will also be the same. Constraints:1 <= s.length <= 1001 <= k <= 104s consists only of lowercase English letters.

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Solution 1

To solve this problem, you can follow these steps:

  1. Initialize an empty string to store the result.
  2. Iterate over each character in the input string.
  3. For each character, calculate the new index by adding the current index and k, then taking the modulus of the string length. This will ensure that the index wraps around to the beginning of the string if it exceeds the string length.
  4. Append the character at the new index to the result string.
  5. After iterating over all characters, return the result string.

Here is a Python solution:

def encrypt(s, k):
    n = len(s)
    result = ''
    for i in range(n):
        new_index = (i + k) % n
        result += s[new_index]
    return result

This function works by iterating over each character in the string, calculating the new index for each character, and appending the character at the new index to the result string. The new index is calculated in a cyclic manner using the modulus operator, which ensures that the index wraps around to the beginning of the string if it exceeds the string length. After iterating over all characters, the function returns the result string.

This problem has been solved

Solution 2

Here is a Python solution for the problem:

def encrypt_string(s, k):
    n = len(s)
    encrypted_string = ''
    for i in range(n):
        encrypted_string += s[(i + k) % n]
    return encrypted_string

This function works by iterating over each character in the string s. For each character at index i, it appends the character at index (i + k) % n to the encrypted_string, where n is the length of the string. The % operator is used to ensure that the index wraps around to the start of the string when it exceeds n.

For example, if s = "dart" and k = 3, the function will append the characters at indices 3, 0, 1, 2 to the encrypted_string, resulting in "tdar".

If s = "aaa" and k = 1, the function will append the characters at indices 1, 2, 0 to the encrypted_string, resulting in "aaa".

This problem has been solved

Similar Questions

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Problem StatementBetty is exploring character encryption using a program. She wants to encrypt a given character based on specific rules:Encrypt a given character by adding 2 to the ASCII value for uppercase Subtract 2 for lowercase letters. For non-alphabetic characters, add 5 to the ASCII value.Create a program that takes Betty's input character, converts it to a signed char, and prints the encrypted result.Input format :The input consists of a char value 'n', representing the character entered by Betty.Output format :The output displays the encrypted character after performing a conversion based on the given rules in the problem statement.Refer to the sample output for the formatting specifications.Code constraints :In this scenario, the test cases fall under the following constraints:The character n contains both lowercase, uppercase, and special characters.Sample test cases :Input 1 :AOutput 1 :CInput 2 :hOutput 2 :fInput 3 :XOutput 3 :ZInput 4 :&Output 4 :+

Betty is exploring character encryption using a program. She wants to encrypt a given character based on specific rules:Encrypt a given character by adding 2 to the ASCII value for uppercase Subtract 2 for lowercase letters. For non-alphabetic characters, add 5 to the ASCII value.

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