CF222B.Cosmic Tables

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题目描述

The Free Meteor Association (FMA) has got a problem: as meteors are moving, the Universal Cosmic Descriptive Humorous Program (UCDHP) needs to add a special module that would analyze this movement.

UCDHP stores some secret information about meteors as an $n×m$ table with integers in its cells. The order of meteors in the Universe is changing. That's why the main UCDHP module receives the following queries:

The query to swap two table rows;
The query to swap two table columns;
The query to obtain a secret number in a particular table cell.

As the main UCDHP module is critical, writing the functional of working with the table has been commissioned to you.

输入格式

The first line contains three space-separated integers $n$ , $m$ and $k$ ( $1<=n,m<=1000$ , $1<=k<=500000$ ) — the number of table columns and rows and the number of queries, correspondingly.

Next $n$ lines contain $m$ space-separated numbers each — the initial state of the table. Each number $p$ in the table is an integer and satisfies the inequality $0<=p<=10^{6}$ .

Next $k$ lines contain queries in the format " $s_{i}$ $x_{i}$ $y_{i}$ ", where $s_{i}$ is one of the characters "с", "r" or "g", and $x_{i}$ , $y_{i}$ are two integers.

If $s_{i}$ = "c", then the current query is the query to swap columns with indexes $x_{i}$ and $y_{i}$ ( $1<=x,y<=m,x≠y$ );
If $s_{i}$ = "r", then the current query is the query to swap rows with indexes $x_{i}$ and $y_{i}$ ( $1<=x,y<=n,x≠y$ );
If $s_{i}$ = "g", then the current query is the query to obtain the number that located in the $x_{i}$ -th row and in the $y_{i}$ -th column ( $1<=x<=n,1<=y<=m$ ).

The table rows are considered to be indexed from top to bottom from 1 to $n$ , and the table columns — from left to right from 1 to $m$ .

输出格式

For each query to obtain a number ( $s_{i}$ = "g") print the required number. Print the answers to the queries in the order of the queries in the input.

输入输出样例

输入#1

输出#1

8
9
6

输入#2
```
2 3 3
1 2 4
3 1 5
c 2 1
r 1 2
g 1 3
```
输出#2
```
5
```

说明/提示

Let's see how the table changes in the second test case.

After the first operation is fulfilled, the table looks like that:

2 1 4

1 3 5

After the second operation is fulfilled, the table looks like that:

1 3 5

2 1 4

So the answer to the third query (the number located in the first row and in the third column) will be 5.

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