N-Shaped Matrix Construction

Construct an $m \times m$ matrix (where $m$ is an odd integer) with a specific pattern: the first column, the main diagonal (from the top-left to bottom-right), and the last column are filled with the plus sign +, while all other positions are filled with the minus sign -.

For example, when $m=5$, the resulting matrix is:

+---+
++--+
+-+-+
+--++
+---+

inputFormat

Input consists of a single odd integer $m$ (with $m \geq 1$).

outputFormat

Print the constructed $m \times m$ matrix. Each row must be printed on a new line.

sample

5

+---+
++--+
+-+-+
+--++
+---+