Convert string to number python leetcode

#Convert string to number python leetcode code#

We can expand the mapping table to include IV, IX, XC, CD and CM where the minus arithmetic is involved.

s consists of English letters (lower-case and upper-case), ',' and '.'. Prefix Method to Convert Roman Numbers to Arabic.

#Convert string to number python leetcode code#

Write the code that will take a string and make this conversion given a number of rows: string convert(string s, int numRows) Д®xample 1: Input: s = 'PAYPALISHIRING', numRows = 3Д®xample 2: Input: s = 'PAYPALISHIRING', numRows = 4

Notes: It is intended for this problem to be specified vaguely (ie, no given input specs). If you want a challenge, please do not see below and ask yourself what are the possible input cases. Hint: Carefully consider all possible input cases. The idea of dummy node is we initialize a unused node firstly, then we always keep the dummy.next to be the head node. Leetcode (Python): String to Integer (atoi) Implement atoi to convert a string to an integer. 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 NДЄnd then read line by line: 'PAHNAPLSIIGYIR' Here, we are given a string s and number of rows numRows.The ask is to take one character of the string at a time and write it in a new row until we reach to the given numRows.Once we reach to the end, we continue writing the next character in the next column and row - 1 until we reach the first row. Hence the code is a little complicated, and itвЂ™s also mixed with other logic for merging node.