Microsoft | OA Coding Questions and Solutions | Set - 8| 2022

Question

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Answer 1

Microsoft Online Assessment (OA) - Maximum Length of a Concatenated String with Unique Characters

Given an array of strings arr. String s is a concatenation of a sub-sequence of arr which have unique characters. Return the maximum possible length of s.

Constraints:

• 1 <= arr.length <= 16
• 1 <= arr[i].length <= 26
• arr[i] contains only lower case English letters.

Example 1:

Input: ["un","iq","ue"]

Output: 4

Explanation:

All possible concatenations are "","un","iq","ue","uniq" and "ique".

Example 2:

Input: ["cha","r","act","ers"]

Output: 6

Explanation:

Possible solutions are "chaers" and "acters".

Example 3:

Input: ["abcdefghijklmnopqrstuvwxyz"]

Output: 26

Explanation:

impossible to concatenate as letters wont be unique.