Question Link : https://leetcode.com/problems/missing-number/

Difficulty: Easy

Premium: False

Question

Given an array nums containing n distinct numbers in the range [0, n], return the only number in the range that is missing from the array.   Example 1:

Input: nums = [3,0,1] Output: 2 Explanation: n = 3 …

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Question Link : https://leetcode.com/problems/task-scheduler/

Difficulty: Medium

Premium: False

Question

You are given an array of CPU tasks, each labeled with a letter from A to Z, and a number n. Each CPU interval can be idle or allow the completion of one task. Tasks can be completed …

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Question Link : https://leetcode.com/problems/number-of-same-end-substrings/

Difficulty: Medium

Premium: True

Question

You are given a 0-indexed string s, and a 2D array of integers queries, where queries[i] = [li, ri] indicates a substring of s starting from the index li and ending at the index ri (both inclusive), i …

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Question Link : https://leetcode.com/problems/palindrome-number/

Difficulty: Easy

Premium: False

Question

Given an integer x, return true if x is a palindrome, and false otherwise.   Example 1:

Input: x = 121 Output: true Explanation: 121 reads as 121 from left to right and from right to left.

Example 2:

Input …

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Question Link : https://leetcode.com/problems/number-of-zero-filled-subarrays/

Difficulty: Medium

Premium: False

Question

Given an integer array nums, return the number of subarrays filled with 0. A subarray is a contiguous non-empty sequence of elements within an array.   Example 1:

Input: nums = [1,3,0,0,2,0,0,4] Output …

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Question Link : https://leetcode.com/problems/ugly-number/

Difficulty: Easy

Question

An ugly number is a positive integer whose prime factors are limited to 2, 3, and 5. Given an integer n, return true if n is an ugly number.   Example 1:

Input: n = 6 Output: true Explanation: 6 = 2 × …

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Question Link : https://leetcode.com/problems/rectangle-area/

Difficulty: Medium

Question

Given the coordinates of two rectilinear rectangles in a 2D plane, return the total area covered by the two rectangles. The first rectangle is defined by its bottom-left corner (ax1, ay1) and its top-right corner (ax2, ay2). The second rectangle …

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Question Link : https://leetcode.com/problems/smallest-even-multiple/

Difficulty: Easy

Question

Given a positive integer n, return the smallest positive integer that is a multiple of both 2 and n.   Example 1:

Input: n = 5 Output: 10 Explanation: The smallest multiple of both 5 and 2 is 10.

Example 2:

Input …

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Question Link : https://leetcode.com/problems/number-of-common-factors/

Difficulty: Easy

Question

Given two positive integers a and b, return the number of common factors of a and b. An integer x is a common factor of a and b if x divides both a and b.   Example 1:

Input: a = 12 …

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Question Link : https://leetcode.com/problems/average-value-of-even-numbers-that-are-divisible-by-three/

Difficulty: Easy

Question

Given an integer array nums of positive integers, return the average value of all even integers that are divisible by 3. Note that the average of n elements is the sum of the n elements divided by n and rounded …

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