Software Engineer

You have been given a string 'S' which only consists of lowercase English-Alphabet letters.

Your task is to find the shortest(minimum length) substring of 'S' which contains all the characters of 'S' at least once. If there are many substrings with the shortest length, then find one which appears earlier in the string i.e. substring whose starting index is lowest.

For example-

If the given string is S = "abcba", then the possible substrings are "abc" and "cba". As "abc" starts with a lower index (i.e. 0, "cba" start with index 2), we will print "abc" as our shortest substring that contains all characters of 'S'.

You are given an array of 'N' non-negative integers, representing the digits of a number, and an integer 'K'. Your task is to find the maximum possible number that can be made by swapping the digits of the given number at most 'K' times.

Note :

1. The input may have 0 before the most significant digit, [0,3,5,7] is a valid input and it represents number 357.
2. Digits in the number can be repeated, i.e [3, 3, 4, 4] is a valid input and it represents the number 3344.

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Why do you want to join Natwest?
Preferred job location and any question for interviewers.