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Arsenal’s journey under Mikel Arteta has long been a reference point for Chelsea’s owners. It is part of the club’s shift towards youth and potential after the Roman Abramovich era. Chelsea have built with a long-term view and, seeing how Arteta has reversed Arsenal’s decline since his appointment as manager in December 2019, have been keen to find a young coach capable of becoming a similarly galvanising force at Stamford Bridge.
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// 当前元素入栈：成为「左侧元素」的候选更大值（易错点4：别漏写这一步）
优点：计算简单，导数恒为1（正区间），缓解梯度消失