package com.mathlearning.util;

public class PasswordValidator {
    public static boolean isValid(String password) {
        if (password == null || password.length() < 6 || password.length() > 10) {
            return false;
        }
        
        boolean hasUpperCase = false;
        boolean hasLowerCase = false;
        boolean hasDigit = false;
        
        for (char c : password.toCharArray()) {
            if (Character.isUpperCase(c)) hasUpperCase = true;
            if (Character.isLowerCase(c)) hasLowerCase = true;
            if (Character.isDigit(c)) hasDigit = true;
        }
        
        return hasUpperCase && hasLowerCase && hasDigit;
    }
}