Chessboard Operation Simulation

Given the initial state of a chessboard and a sequence of operations, determine the final state of the board after all operations have been performed. The board is represented by an R \times C matrix, where each cell contains an integer.

Each operation is represented by three integers r, c, and v which indicates that the cell at row r and column c is updated to the value v. In mathematical terms, the operation is:

$$board[r][c] = v$$

Note: The indices r and c are 0-based.

inputFormat

The first line contains two space-separated integers R and C denoting the number of rows and columns of the board.

The next R lines each contain C integers representing the initial state of the board.

The following line contains a single integer Q denoting the number of operations.

Each of the next Q lines contains three space-separated integers r, c, and v, representing an operation that sets the value of board[r][c] to v.

outputFormat

Output the final state of the board after executing all operations. Print R lines, each containing C space-separated integers.

sample

3 3
1 2 3
4 5 6
7 8 9
2
0 0 10
1 2 20

10 2 3
4 5 20
7 8 9