QUESTION:
An integer n is strictly palindromic if, for every base b between 2 and n - 2 (inclusive), the string representation of the integer n in base b is palindromic.
Given an integer n, return true if n is strictly palindromic and false otherwise.
A string is palindromic if it reads the same forward and backward.
Example 1:
Input: n = 9
Output: false
Explanation: In base 2: 9 = 1001 (base 2), which is palindromic.
In base 3: 9 = 100 (base 3), which is not palindromic.
Therefore, 9 is not strictly palindromic so we return false.
Note that in bases 4, 5, 6, and 7, n = 9 is also not palindromic.
Example 2:
Input: n = 4
Output: false
Explanation: We only consider base 2: 4 = 100 (base 2), which is not palindromic.
Therefore, we return false.
Constraints:
4 <= n <= 105
EXPLANATION:
按着模拟出来即可, 但是还有简单的方法, 直接返回false就行.
SOLUTION:
class Solution {
func isStrictlyPalindromic(_ n: Int) -> Bool {
var result = true
for i in 2...n {
var tmpA = Array(String(n, radix: i))
var tmpB = Array(tmpA.reversed())
if tmpA != tmpB {
return false
}
}
return result
}
}