Problem statement You are given a string 'STR' representing JSON object. Return an array of strings denoting JSON objects with proper indentation. Rules for proper indentation: 1. Every inner brace should increase one indentation to the following lines. 2. Every close brace should decrease one indentation to the same line and the following lines. 3. Every ‘,’ will mean a separate line. 4. The indents can be increased with an additional 4 spaces or ‘/t’. Example: Let the input be: "{A:"B",C:{D:"E",F:{G:"H",I:"J"}}}" Then we return the following array of strings: { A:"B", C: { D:"E", F: { G:"H", I:"J" } } } Note that for every new brace we are putting an additional 4 spaces or \t. Note: 1. [] and {} are only acceptable braces in this case.

Covide 19 : Social Distancing Problem My roommates and me are planning a house party. Because of covid, the Dutch rules says that we can have a party as long as social distancing is maintained — each individual has to be at least 1.5m away from each other. This brings me to a cool real life problem — what is the minimum area required to fit N people such that each one maintains social distancing with everyone else. N > 2, since we are already 3 roommates :) My guessed solution is to make everyone stand on the vertices of equilateral triangle, and then join these triangles to form hexagonal lattice (just like a cellular network). Hence the answer would be (N — 2) * area of equilateral triangle of side 1.5m. Is this correct? If yes, a follow up question would be : What if I wanted to minimise the distance between the farthest people as well? Would I try to fit these triangles inside a square? Will be nice to hear out solutions to both these problems, for any number of people (N).

Given the list of emails, print whether each of them is valid or not! Given a string email that denotes an Email Address, the task is to check if the given string is a valid email id or not. If found to be true, then print “Valid”. Otherwise, print “Invalid”. A valid email address consists of an email prefix and an email domain, both in acceptable formats: The email address must start with a letter (no numbers or symbols). There must be an @ somewhere in the string that is located before the dot. There must be text after the @ symbol but before the dot. There must be a dot and text after the dot.