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[LeetCode] Shortest String That Contains Three Strings 2023-07-30|PSLeetCode|Problem Solving

2800. Shortest String That Contains Three Strings

Given three strings a, b, and c, your task is to find a string that has the minimum length and contains all three strings as substrings.

If there are multiple such strings, return the lexicographically smallest one.

Return a string denoting the answer to the problem.

Notes

A string a is lexicographically smaller than a string b (of the same length) if in the first position where a and b differ, string a has a letter that appears earlier in the alphabet than the corresponding letter in b.

A substring is a contiguous sequence of characters within a string.

[LeetCode] Count Complete Subarrays in an Array 2023-07-30|PSLeetCode|Problem Solving-Two Pointer-Sliding Window

2799. Count Complete Subarrays in an Array

You are given an array nums consisting of positive integers.

We call a subarray of an array complete if the following condition is satisfied:

The number of distinct elements in the subarray is equal to the number of distinct elements in the whole array.

Return the number of complete subarrays.

A subarray is a contiguous non-empty part of an array.

[LeetCode] Number of Employees Who Met the Target 2023-07-30|PSLeetCode|Problem Solving

2798. Number of Employees Who Met the Target

There are n employees in a company, numbered from 0 to n - 1. Each employee i has worked for hours[i] hours in the company.

The company requires each employee to work for at least target hours.

You are given a 0-indexed array of non-negative integers hours of length n and a non-negative integer target.

Return the integer denoting the number of employees who worked at least target hours.