Reversing a Number

Problem Source

Luogu P5705

Problem Description

Input a floating-point number that is at least $100$ and less than $1000$, and that has exactly one digit after the decimal point, for example $123.4$. Reverse this number to become $4.321$ and output it.

Input Format

One line containing a floating-point number.

Output Format

One line containing a floating-point number.

Sample Input

123.4

Sample Output

4.321

Hint

• The input looks like 123.4: the integer part has 3 digits and the fractional part is fixed at 1 digit.
• Handling it directly as a number is awkward — try reading it in as a string of characters (string) and see what happens when you output it backwards.
• Check against the sample: 123.4 → 4.321.