* @param n 堆的大小
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输入：target = 12, position = [10,8,0,5,3], speed = [2,4,1,1,3]
“The notion that this was a playful snowball fight obviously is not true,” Patrick Hendry, a police union president, told reporters after the proceeding. “This was an attack on the uniform that these police officers wear so proudly every day. They came after these police officers, pelting them with ice, rocks.”