Module leetcode_rust::problems::p000_0xx::p000_006

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Problem #6 ZigZag Conversion

Description

The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)

P   A   H   N
A P L S I I G
Y   I   R

And then read line by line: “PAHNAPLSIIGYIR”

Write the code that will take a string and make this conversion given a number of rows:

string convert(string s, int numRows);

Example 1
Input: s = “PAYPALISHIRING”, numRows = 3
Output: “PAHNAPLSIIGYIR”
Example 2
Input: s = “PAYPALISHIRING”, numRows = 4
Output: “PINALSIGYAHRPI”

Explanation: 

P     I    N 
A   L S  I G 
Y A   H R 
P     I
Example 3
Input: s = “A”, numRows = 1
Output: “A”

Constraints:

  • 1 <= s.length <= 1000
  • s consists of English letters (lower-case and upper-case), ‘,’ and ‘.’.
  • 1 <= numRows <= 1000

Source: https://leetcode.com/problems/zigzag-conversion/

Enums

Algorithm
Enum choosing algorithm for the solution

Functions

zigzag_conversion
Get a ZigZag matrix using given string and column-first algorithm.