#AT2223. C - Rotation
C - Rotation
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C - Rotation
Score : $300$ points
Problem Statement
You are given positive integers $N$ and $Q$, and a string $S$ of length $N$ consisting of lowercase English letters.
Process $Q$ queries. Each query is of one of the following two types.
1 x
: Perform the following $x$ times in a row: delete the last character of $S$ and append it to the beginning.2 x
: Print the $x$-th character of $S$.
Constraints
- $2 \le N \le 5 \times 10^5$
- $1 \le Q \le 5 \times 10^5$
- $1 \le x \le N$
- $|S|=N$
- $S$ consists of lowercase English letters.
- At least one query in the format
2 x
. - $N$, $Q$, $x$ are all integers.
Input
Input is given from Standard Input in the following format:
Each query is in the following format, where $t$ is $1$ or $2$:
``` $t$ $x$ ```Output
For each query in the format 2 x
, print the answer in a single line.
3 3
abc
2 2
1 1
2 2
b
a
In the $1$-st query, $S$ is abc
, so the $2$-nd character b
should be printed.
In the $2$-nd query, $S$ is changed from abc
to cab
.
In the $3$-rd query, $S$ is cab
, so the $2$-nd character a
should be printed.
10 8
dsuccxulnl
2 4
2 7
1 2
2 7
1 1
1 2
1 3
2 5
c
u
c
u