CF816A Karen and Morning

Karen is getting ready for a new school day! It is currently hh:mm, given in a 24-hour format. As you know, Karen loves palindromes, and she believes that it is good luck to wake up when the time is a palindrome. What is the minimum number of minutes she should sleep, such that, when she wakes up, the time is a palindrome? Remember that a palindrome is a string that reads the same forwards and backwards. For instance, 05:39 is not a palindrome, because 05:39 backwards is 93:50. On the other hand, 05:50 is a palindrome, because 05:50 backwards is 05:50.

The first and only line of input contains a single string in the format hh:mm ( $ 00

Output a single integer on a line by itself, the minimum number of minutes she should sleep, such that, when she wakes up, the time is a palindrome.

In the first test case, the minimum number of minutes Karen should sleep for is $ 11 $ . She can wake up at 05:50, when the time is a palindrome. In the second test case, Karen can wake up immediately, as the current time, 13:31, is already a palindrome. In the third test case, the minimum number of minutes Karen should sleep for is $ 1 $ minute. She can wake up at 00:00, when the time is a palindrome.