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.

凯伦正在为新的一天上学做准备！

当前时间为 hh:mm（24 小时制）。众所周知，凯伦非常喜欢回文串，她相信在时间显示为回文串时醒来会带来好运。

请问：她至少还需要睡多少分钟，才能在醒来时看到一个回文时间？

注意：回文串是指正读与反读都完全相同的字符串。例如，05:39 不是回文串，因为将其反转后得到 93:50；而 05:50 是回文串，因为将其反转后仍为 05:50。

The first and only line of input contains a single string in the format hh:mm (00 ≤  hh  ≤ 23, 00 ≤  mm  ≤ 59).

输入仅有一行，包含一个格式为 hh:mm 的字符串（其中 $00 \leq hh \leq 23$，$00 \leq mm \leq 59$）。

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.

在单独一行输出一个整数，表示她至少需要睡眠的分钟数，使得她醒来时的时间是一个回文。

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.

在第一个测试用例中，Karen 至少需要睡眠 11 分钟。她可以在 05:50 醒来，此时的时间是一个回文。

在第二个测试用例中，Karen 可以立即醒来，因为当前时间 13:31 本身就是一个回文。

在第三个测试用例中，Karen 至少需要睡眠 1 分钟。她可以在 00:00 醒来，此时的时间是一个回文。