Problem E. Increases Input file: Output file: standard input standard output 1 second 256 megabytes Time limit: Memory limit: You are given an integer number n. You need to print the matrix of size n...

using c++ with comments please

Extracted text: Problem E. Increases Input file: Output file: standard input standard output 1 second 256 megabytes Time limit: Memory limit: You are given an integer number n. You need to print the matrix of size n x n as it is shown in sample tests. Input The only line of the input contains an integer n - size of the matrix. Output Print the matrix. Examples standard input standard output 3 1 23 21 2 3 21 4 123 4 2123 3 212 4 3 2 1 5 1 23 4 5 21 2 3 4 3 21 2 3 4 3 212 5 4 321