CF1857B Maximum Rounding
Description
Given a natural number $ x $ . You can perform the following operation:
- choose a positive integer $ k $ and round $ x $ to the $ k $ -th digit
Note that the positions are numbered from right to left, starting from zero. If the number has $ k $ digits, it is considered that the digit at the $ k $ -th position is equal to $ 0 $ .
The rounding is done as follows:
- if the digit at the $ (k-1) $ -th position is greater than or equal to $ 5 $ , then the digit at the $ k $ -th position is increased by $ 1 $ , otherwise the digit at the $ k $ -th position remains unchanged (mathematical rounding is used).
- if before the operations the digit at the $ k $ -th position was $ 9 $ , and it should be increased by $ 1 $ , then we search for the least position $ k' $ ( $ k'>k $ ), where the digit at the $ k' $ -th position is less than $ 9 $ and add $ 1 $ to the digit at the $ k' $ -th position. Then we assign $ k=k' $ .
- after that, all digits which positions are less than $ k $ are replaced with zeros.
Your task is to make $ x $ as large as possible, if you can perform the operation as many times as you want.
For example, if $ x $ is equal to $ 3451 $ , then if you choose consecutively:
- $ k=1 $ , then after the operation $ x $ will become $ 3450 $
- $ k=2 $ , then after the operation $ x $ will become $ 3500 $
- $ k=3 $ , then after the operation $ x $ will become $ 4000 $
- $ k=4 $ , then after the operation $ x $ will become $ 0 $
To maximize the answer, you need to choose $ k=2 $ first, and then $ k=3 $ , then the number will become $ 4000 $ .
Input Format
The first line contains a single integer $ t $ ( $ 1\le t\le 10^4 $ ) — the number of test cases.
Each test case consists of positive integer $ x $ with a length of up to $ 2 \cdot 10^5 $ . It is guaranteed that there are no leading zeros in the integer.
It is guaranteed that the sum of the lengths of all integers $ x $ over all test cases does not exceed $ 2 \cdot 10^5 $ .
Output Format
For each set of input data, output the maximum possible value of $ x $ after the operations. The number should not have leading zeros in its representation.
Explanation/Hint
In the first sample, it is better not to perform any operations.
In the second sample, you can perform one operation and obtain $ 10 $ .
In the third sample, you can choose $ k=1 $ or $ k=2 $ . In both cases the answer will be $ 100 $ .