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算法day6---找出数组出现一次的数

public static void main(String[] args) { int []arr={2,2,2,9,7,7,7,3,3,3,6,6,6,0,0,0}; int len=arr.length; char[][]kRadix=new char[len][]; int k=3; int maxLen=0; for (int i = 0; i < len; i++) { kRadix[i]=new StringBuilder(Intege