In January, pollster YouGov released new data suggesting a majority of Britons now believe London is unsafe, but only a third of people surveyed in the capital agreed - and 81% of them said their own local area was safe.
const cur = val; // 简化变量名，代表当前价格
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1L decoder, d=7, 1h, ff=14
A letter understood to be from a former employee of Wembley Stadium raised concerns about safety
* @param arr 数组