* 时间复杂度：O(n)，空间复杂度：O(n)
Chris BaraniukTechnology Reporter
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As the spacecraft re-emerged from the darkness, Lovell was first to announce the good news. "Please be advised," he said as the radio crackled back into life, "there is a Santa Claus."
"From when you first wake up, you think, is today going to be the day we get that call?" he said.
Наталья Анисеева (редактор отдела оперативной информации)