CF484C.Strange Sorting
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题目描述
How many specific orders do you know? Ascending order, descending order, order of ascending length, order of ascending polar angle... Let's have a look at another specific order: d -sorting. This sorting is applied to the strings of length at least d , where d is some positive integer. The characters of the string are sorted in following manner: first come all the 0-th characters of the initial string, then the 1-st ones, then the 2-nd ones and so on, in the end go all the (d−1) -th characters of the initial string. By the i -th characters we mean all the character whose positions are exactly i modulo d . If two characters stand on the positions with the same remainder of integer division by d , their relative order after the sorting shouldn't be changed. The string is zero-indexed. For example, for string 'qwerty':
Its 1-sorting is the string 'qwerty' (all characters stand on 0 positions),
Its 2-sorting is the string 'qetwry' (characters 'q', 'e' and 't' stand on 0 positions and characters 'w', 'r' and 'y' are on 1 positions),
Its 3-sorting is the string 'qrwtey' (characters 'q' and 'r' stand on 0 positions, characters 'w' and 't' stand on 1 positions and characters 'e' and 'y' stand on 2 positions),
Its 4-sorting is the string 'qtwyer',
Its 5-sorting is the string 'qywert'.
You are given string S of length n and m shuffling operations of this string. Each shuffling operation accepts two integer arguments k and d and transforms string S as follows. For each i from 0 to n−k in the increasing order we apply the operation of d -sorting to the substring S\[i..i+k-1\] . Here S\[a..b\] represents a substring that consists of characters on positions from a to b inclusive.
After each shuffling operation you need to print string S .
输入格式
The first line of the input contains a non-empty string S of length n , consisting of lowercase and uppercase English letters and digits from 0 to 9.
The second line of the input contains integer m – the number of shuffling operations ( 1<=m⋅n<=106 ).
Following m lines contain the descriptions of the operations consisting of two integers k and d ( 1<=d<=k<=n ).
输出格式
After each operation print the current state of string S .
输入输出样例
输入#1
qwerty 3 4 2 6 3 5 2
输出#1
qertwy qtewry qetyrw
说明/提示
Here is detailed explanation of the sample. The first modification is executed with arguments k=4 , d=2 . That means that you need to apply 2-sorting for each substring of length 4 one by one moving from the left to the right. The string will transform in the following manner:
qwerty → qewrty → qerwty → qertwy
Thus, string S equals 'qertwy' at the end of first query.
The second modification is executed with arguments k=6 , d=3 . As a result of this operation the whole string S is replaced by its 3-sorting:
qertwy → qtewry
The third modification is executed with arguments k=5 , d=2 .
qtewry → qertwy → qetyrw