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."
// 易错点1:未初始化数组长度 → 赋值res[i]时会报错;无需fill(0),因为每个位置都会显式赋值
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arr.push(p.val); // 存储节点值而非节点本身,简化后续操作,详情可参考服务器推荐
(四)出于他人胁迫或者诱骗的;