"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:
Write the code that will take a string and make this conversion given a number of rows:
string convert(string s, int numRows);
Input: s = "PAYPALISHIRING", numRows = 3 Output: "PAHNAPLSIIGYIR"
Input: s = "PAYPALISHIRING", numRows = 4 Output: "PINALSIGYAHRPI" Explanation: P I N A L S I G Y A H R P I
Input: s = "A", numRows = 1 Output: "A"
1 <= s.length <= 1000
sconsists of English letters (lower-case and upper-case),
1 <= numRows <= 1000
The main gist of this question is to get the idea of how we can use StringBuilder to append the characters at a particular level of the row. It is being explained in a detailed way in the video.
Time Complexity: O(n) // for traversing through each character of the string.
Space Complexity: O(n) // for storing the result in StringBuilder.