Background This is a standard textbook example to demonstrate for loops. This is one of the first programs I learnt when I started learning programming ~10 years ago. Task You are to print this exact text: ********** ********** ********** ********** ********** ********** ********** ********** ***...

Taxi Helper string popularity-contest Imagine you're a Taxi driver. Everyday you drive, pickup passengers, pay for fuel, and get paid for driving. Your daily routine: The starting place is the Taxi Garage. Drive the taxi from on place to the other. Every Place has an event, like add numerical pa...

Given an input \$n\$, output two primes whose difference is \$n\$. It's fine if there's another prime between them. Every pair should possibly appear and the program should have zero possibility to fall into infinite loop. It's promised that such pair exist, but not always infinite, so beware. Te...

Take two registers, zero-extend one to another one on x64 in a single instruction. Here, registers are r0-r15(64-bit), r0d-r15d(32-bit), r0w-r15w(16-bit) and r0b-r15b(8-bit), where regs marking same number share same lowest part. In case there's no solution (e.g. writing into r0d, which the opcod...