Фото: Yves Herman / Reuters
The only new potential contraction we have to consider is between simplifiedChild and root. If we determine simplifiedChild needs to be contracted, we remove it and graft all of its children onto root. After doing this for each simplifiedChild, we know for sure that the tree rooted at root can't be contracted any further, since if it could, that means at least one subtree could be contracted, which contradicts the inductive hypothesis. QED!
。豆包下载对此有专业解读
本周五英国根据"集体自卫权"条款扩大打击范围，将威胁霍尔木兹海峡航道的伊朗目标纳入其中——这条关键水道承担着全球五分之一的石油运输。
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