Python Solution for Codeforces Problem 118A - String Task

Introduction

Codeforces, a premier platform for competitive programming, presents an array of intriguing problems that challenge programmers' logical thinking. Codeforces problem 118A - String Task, dives into the world of string manipulation. In this article, we'll delve into an optimized Python solution for this problem, comprehensively explaining the code's mechanics, while underlining the significance of Codeforces in honing coding skills.

Codeforces Problem 118A - String Task

Codeforces problem 118A, aptly named "String Task," immerses participants in the task of string manipulation, resulting in a modified string. The problem tasks programmers with transforming the input string by adding dots before the consonants and converting it to lowercase.

Python Solution for Problem 118A - String Task

k = input()
k = k.lower()
s = ""
L = ['a' , 'e' , 'i' , 'o' , 'u' , 'y']
for i in range(0,len(k)):
    if k[i] not in L:
        s+='.'
        s+=k[i]
        
print(s)

Explanation of the Python Code

1. Input Acquisition and Lowercasing: The code initiates by reading an input string `k`. The string is converted to lowercase using the `.lower()` method to ensure uniformity in character comparison.

2. Consonant Filtering and Modification: The code employs a loop that iterates through the characters of the input string. For each character, the code checks if it is not a vowel (not in the list `L`). If it's a consonant, a dot is added to the string `s`, followed by the consonant itself.

3. Output Display: The code constructs the modified string `s` by adding dots before consonants and prints the result.

Conclusion

Competitive programming hinges on the mastery of problem-solving techniques, as epitomized by Codeforces problem 118A - String Task. The Python solution discussed above empowers programmers to artfully transform a string by adding dots before consonants and converting it to lowercase. This coding endeavor underscores the importance of loops, conditions, and string manipulation in problem-solving.

Platforms like Codeforces offer an optimal arena to nurture problem-solving skills, enhance coding efficiency, and engage in captivating coding contests. This article serves as a guide, unveiling the intricacies of the String Task problem and charting a course toward mastering similar algorithmic challenges.

Embark on the captivating journey of competitive programming, equipped with a comprehensive grasp of core concepts. This expertise equips you to elegantly tackle coding challenges, fostering a continuous cycle of improvement and exploration. Happy coding and problem-solving!