Today’s question is from Daily Leetcode Coding Challenge — March Edition. It is a medium-tagged question. Let us look into the problem statement.
841. Keys and Rooms
There are N rooms and you start in room 0. Each room has a distinct number in 0, 1, 2, ..., …
Today’s question is a SQL question. Let us look into the problem statement.
196. Delete Duplicate Emails
Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id.
+----+------------------+
| Id | Email…Today’s question is a Math based question. It is taken from the Daily leetcode coding challenge- March edition. Let us look into the problem statement.
478. Generate Random Point in a Circle
Given the radius and x-y positions of the center of a circle, write a function randPoint which generates…
Today’s question is taken from the Daily Leetcode Coding challenge — March edition. Let us look into the problem statement.
1721. Swapping Nodes in a Linked List
You are given the head of a linked list, and an integer k.
Return the head of the linked list after swapping the…
Today’s question is from Leetcode’s Daily coding Challenge- March Edition. Let us look into the problem statement.
1461. Check If a String Contains All Binary Codes of Size K
Given a binary string s and an integer k.
Return True if every binary code of length k is a substring…
Today’s question is a Hard-tagged question on Leetcode. This question is quite frequently asked in technical interviews. Let us look into the problem statement.
41. First Missing Positive
Given an unsorted integer array nums, find the smallest missing positive integer.
Example 1:
Input: nums = [1,2,0]
Output: 3Example 2:
…Today’s question is a medium-tagged question in Leetcode. This question is asked in multiple coding interviews. Let us look into the problem statement.
12. Integer to Roman
Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M.
Symbol…Today’s question is a SQL question. Let us look into the problem statement.
181. Employees Earning More Than Their Managers
The Employee table holds all employees including their managers. Every employee has an Id, and there is also a column for the manager Id.
+----+-------+--------+-----------+
| Id | Name |…Today’s question is a medium-tagged question on leetcode. Let us look into the problem statement.
247. Strobogrammatic Number II
Given an integer n, return all the strobogrammatic numbers that are of length n. You may return the answer in any order.
A strobogrammatic number is a number that looks the…
