CodeForces 222B Cosmic Tables_牛客题霸

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.

输入描述:

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 ≤ 106.Next k lines contain queries in the format "sixiyi", where si is one of the characters "с", "r" or "g", and xi, yi are two integers. If si = "c", then the current query is the query to swap columns with indexes xi and yi (1 ≤ x, y ≤ m, x ≠ y); If si = "r", then the current query is the query to swap rows with indexes xi and yi (1 ≤ x, y ≤ n, x ≠ y); If si = "g", then the current query is the query to obtain the number that located in the xi-th row and in the yi-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.

输出描述:

For each query to obtain a number (si = "g") print the required number. Print the answers to the queries in the order of the queries in the input.

示例1

输入

3 3 5<br />1 2 3<br />4 5 6<br />7 8 9<br />g 3 2<br />r 3 2<br />c 2 3<br />g 2 2<br />g 3 2<br />2 3 3<br />1 2 4<br />3 1 5<br />c 2 1<br />r 1 2<br />g 1 3<br />

输出

8<br />9<br />6<br />5<br />

备注:

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 41 3 5After the second operation is fulfilled, the table looks like that:1 3 52 1 4So the answer to the third query (the number located in the first row and in the third column) will be 5.