Аз ли нещо не мога да вникна в условието на задачата, не знам защо не ми се получава, какво значи специален символ, след като в условието е казано, че всички символи преди числата.

Изкарвам 57 символа, а искат 53. Ако някой има идея, ще се радвам да помогне, че вече се отчаях  По принцип е от материала с регекс, ама с регекс не успях да измисля алгоритъм и тръгнах по бавния, но сигурен уж начин.

Дали са някакви елементарни inputs в условието, обаче с този от тестовете в judge, разцепват мрака при тази задача :D С този вход гърмят специалните символи, иска 53, а не 57:

e-!btI17z=E:DMJ19U1Tvg VQ>11P"qCmo.-0YHYu~o%/%b.}a[=d15fz^"{0^/pg.Ft{W12`aD<l&$W&)*yF1WLV9_GmTf(d0($!$`e/{D'xi]-~17 *%p"%|N>zq@ %xBD18<Y(fHh`@gu#Z#p"Z<v13fI]':\Iz.17*W:\mwV`z-15g@hUYE{_$~}+X%*nytkW15

https://pastebin.com/qUzPx8xk

https://judge.softuni.bg/Contests/Practice/Index/1754#1

Rage Quit

Every gamer knows what rage-quitting means. It’s basically when you’re just not good enough and you blame everybody else for losing a game. You press the CAPS LOCK key on the keyboard and flood the chat with gibberish to show your frustration.

Chochko is a gamer, and a bad one at that. He asks for your help; he wants to be the most annoying kid in his team, so when he rage-quits he wants something truly spectacular. He’ll give you a series of strings followed by non-negative numbers, e.g. "a3"; you need to print on the console each string repeated N times; convert the letters to uppercase beforehand. In the example, you need to write back "AAA".

On the output, print first a statistic of the number of unique symbols used (the casing of letters is irrelevant, meaning that 'a' and 'A' are the same); the format shoud be "Unique symbols used {0}". Then, print the rage message itself.

The strings and numbers will not be separated by anything. The input will always start with a string and for each string there will be a corresponding number. The entire input will be given on a single line; Chochko is too lazy to make your job easier.

Input

• The input data should be read from the console.
• It consists of a single line holding a series of string-number sequences.
• The input data will always be valid and in the format described. There is no need to check it explicitly.

Output

• The output should be printed on the console. It should consist of exactly two lines.
• On the first line, print the number of unique symbols used in the message.
• On the second line, print the resulting rage message itself.

Constraints

• The count of string-number pairs will be in the range [1 … 20 000].
• Each string will contain any character except digits. The length of each string will be in the range [1 … 20].
• The repeat count for each string will be an integer in the range [0 … 20].
• Allowed working time for your program: 0.3 seconds. Allowed memory: 64 MB.

Examples