Given a string s and an integer numRows, rearrange the characters of s by writing them in a zigzag pattern across numRows rows, then reading the result row by row from top to bottom.

For example, writing "COMPUTER" in a zigzag pattern across 3 row produces:

This will be read as "CUOPTRME".

Constraints:

• $1 \leq$ s.length $\leq 1000$

• s consists of English letters (lower-case and upper-case), ',' and '.'.

• $1\le$ ...