README.md

2299. Strong Password Checker II

A password is said to be strong if it satisfies all the following criteria:

• It has at least 8 characters.
• It contains at least one lowercase letter.
• It contains at least one uppercase letter.
• It contains at least one digit.
• It contains at least one special character. The special characters are the characters in the following string: "!@#$%^&*()-+".
• It does not contain 2 of the same character in adjacent positions (i.e., "aab" violates this condition, but "aba" does not).

Given a string password, return true if it is a strong password. Otherwise, return false.

Example 1:

Input: password = "IloveLe3tcode!"
Output: true
Explanation: The password meets all the requirements. Therefore, we return true.

Example 2:

Input: password = "Me+You--IsMyDream"
Output: false
Explanation: The password does not contain a digit and also contains 2 of the same character in adjacent positions. Therefore, we return false.

Example 3:

Input: password = "1aB!"
Output: false
Explanation: The password does not meet the length requirement. Therefore, we return false.

Constraints:

• 1 <= password.length <= 100
• password consists of letters, digits, and special characters: "!@#$%^&*()-+".

Solutions (Rust)

1. Solution

impl Solution {
    pub fn strong_password_checker_ii(password: String) -> bool {
        password.len() >= 8
            && password.chars().any(|c| c.is_lowercase())
            && password.chars().any(|c| c.is_uppercase())
            && password.chars().any(|c| c.is_digit(10))
            && password.chars().any(|c| "!@#$%^&*()-+".contains(c))
            && password
                .chars()
                .zip(password.chars().skip(1))
                .all(|(c1, c2)| c1 != c2)
    }
}