[Leet Code] Merge Strings Alternately

Leetcode: https://leetcode.com/problems/merge-strings-alternately/

Problem:

You are given two strings word1 and word2. Merge the strings by adding letters in alternating order, starting with word1. If a string is longer than the other, append the additional letters onto the end of the merged string.

Return the merged string.

Example 1:

Input: word1 = "abc", word2 = "pqr"
Output: "apbqcr"
Explanation: The merged string will be merged as so:
word1: a b c
word2: p q r
merged: a p b q c r

Example 2:

Input: word1 = "ab", word2 = "pqrs"
Output: "apbqrs"
Explanation: Notice that as word2 is longer, "rs" is appended to the end.
word1: a b
word2: p q r s
merged: a p b q r s

Example 3:

Input: word1 = "abcd", word2 = "pq"
Output: "apbqcd"
Explanation: Notice that as word1 is longer, "cd" is appended to the end.
word1: a b c d
word2: p q
merged: a p b q c d

Constraints:

  • word1 and word2 consist of lowercase English letters.

Solution:

class Solution(object):
def mergeAlternately(self, word1, word2):
"""
:type word1: str
:type word2: str
:rtype: str
"""

if len(word1) > len(word2):
word2 = word2 + (' ' * (len(word1) - len(word2)))
elif len(word2) > len(word1):
word1 = word1 + (' ' * (len(word2) - len(word1)))
else:
print "test"

answer = []
for i in range(len(word1)):
answer.append(word1[i])
answer.append(word2[i])

return "".join(answer).replace(' ','')

--

--

Learning, and posting my findings!

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store