چالش شماره 20 برنامه ای بنویسید که یک عدد را از کاربر دریافت کند و اعلام کند که آیا این عدد یک عدد کامل است یا خیر؟ یک عدد کامل (perfect number) عددی است که با مجموع مقسوم علیه‌های خود (بغیر از خود عدد) برابر می باشد. کوچکترین عدد کامل عبارت است از ٦، زیر داریم: 6 = 1 + 2 + 3 اعداد کامل بعدی عبارتند از: 28 = 1 + 2 + 4 + 7 + 14
چالش شماره 20 برنامه ای بنویسید که یک عدد را از کاربر دریافت کند و اعلام کند که آیا این عدد یک عدد کامل است یا خیر؟ یک عدد کامل (perfect number) عددی است که با مجموع مقسوم علیه‌های خود (بغیر از خود عدد) برابر می باشد. کوچکترین عدد کامل عبارت است از ٦، زیر داریم: 6 = 1 + 2 + 3 اعداد کامل بعدی عبارتند از: 28 = 1 + 2 + 4 + 7 + 14
“To the extent it is used I fear it’s often for illicit finance. It’s an extremely inefficient way of conducting transactions, and the amount of energy that’s consumed in processing those transactions is staggering,” the former Fed chairwoman said. Yellen’s comments have been cited as a reason for bitcoin’s recent losses. However, Yellen’s assessment of bitcoin as a inefficient medium of exchange is an important point and one that has already been raised in the past by bitcoin bulls. Using a volatile asset in exchange for goods and services makes little sense if the asset can tumble 10% in a day, or surge 80% over the course of a two months as bitcoin has done in 2021, critics argue. To put a finer point on it, over the past 12 months bitcoin has registered 8 corrections, defined as a decline from a recent peak of at least 10% but not more than 20%, and two bear markets, which are defined as falls of 20% or more, according to Dow Jones Market Data.
To pay the bills, Mr. Durov is issuing investors $1 billion to $1.5 billion of company debt, with the promise of discounted equity if the company eventually goes public, the people briefed on the plans said. He has also announced plans to start selling ads in public Telegram channels as soon as later this year, as well as offering other premium services for businesses and users.
