Blockchain technology was originally invented in 1991 by two mathematicians, Stuart Haber and W. Scot Stornetta. They first proposed the system to ensure that timestamps could not be tampered with.
Елизавета Городищева (Редактор отдела «Экономика»)
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Grammarly has a more friendly UI/UX
while (this.stack.length && this.arr[this.stack[this.stack.length - 1]] <= cur) {