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edX MIT 6.00.1x 2020 Introduction to Computer Science and Programming Using Python

Week 1: Python Basics: Problem Set 1 Problem 3 Solution

Problem 3

Assume s is a string of lower case characters.

Write a program that prints the longest substring of s in which the letters occur in alphabetical order. For example, if s = 'azcbobobegghakl', then your program should print

Longest substring in alphabetical order is: beggh

In the case of ties, print the first substring. For example, if s = 'abcbcd', then your program should print

Longest substring in alphabetical order is: abc

Step by step process. Practice by writing the code yourself.

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