Question

1.5 Is the input number a palindrome? Given an integer x, return true if x is a palindrome, and false otherwise. Input Format The first line contains an integer. Output Format It returns true or false. Constraints -2^31 <= x <= 2^31 - 1 Example 1: 121 Sample output true Example 2: -121 Sample output false Example 3: 0 Sample output true

          1.5 Is the input number a palindrome?
Given an integer x, return true if x is a palindrome, and false otherwise.
Input Format
The first line contains an integer.
Output Format
It returns true or false.
Constraints
-2^31 <= x <= 2^31 - 1
Example 1:
121
Sample output
true
Example 2:
-121
Sample output
false
Example 3:
0
Sample output
true
        
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Added by Margarita E.

Computer Science and Information Technology
Computer Science and Information Technology
Trishna Knowledge Systems 2018 Edition
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1.5 Is the input number a palindrome? Given an integer x, return true if x is a palindrome, and false otherwise. Input Format The first line contains an integer. Output Format It returns true or false. Constraints -2^31 <= x <= 2^31 - 1 Example 1: 121 Sample output true Example 2: -121 Sample output false Example 3: 0 Sample output true
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Transcript

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00:01 Hi, so in this question, we're dealing with the method palindrome word that will spit out a bullion, depending on whether or not the string passed in word is a palindrome or not.
00:12 So in this question, i just have two examples in the bottom, race car and person.
00:17 Race cart is a palindrome.
00:19 Person isn't.
00:20 If we look at race car, we can see that on either side of that middle letter, then all of the letters match each other.
00:30 We have 0 and 6, 1 in 5, 2, and 4.
00:33 So if we want to look at this string to find out if it's a palindrome, we don't need to iterate through the whole thing.
00:40 We just need to iterate through indexes, 1, and 2, comparing those to 4, 5, and 6.
00:47 We can just completely ignore that 3 because that could be anything and it would still be a palindrome.
00:54 So if we want to go through the string, we just need to go through half of the length of the string.
01:01 If you notice i have this little int right here.
01:06 The reason is because, if you can see here, we have the intcast right here.
01:15 The reason i do that is because the four loop in python is not going to accept a decimal value...
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