描述：找出一个连续子数组，若对该子数组升序排序，则整个数组变为升序。返回符合题意的最短子数组长度。
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They migrate thousands of kilometres to find stable sea ice during Antarctic summer to wait out what is called a "catastrophic moult" every year.
During their first foundation year after finishing their medical degree, resident doctors in England earn a basic salary of £38,831. In their second year, this rises to £44,439.