An elite event like the Champions League final will involve upwards of 40 or more cameras.
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"Usdaw will enter into consultation talks and do all we can to interrogate the business case for the company's proposals, while seeking the best deal possible for any of our members who are impacted."
* @return {number} - 最短无序连续子数组的长度，排序该子数组后整个数组升序