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class Solution {
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  int a[];
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  int b[];
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  public Solution(int[] nums) {
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    a = nums.clone();
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    b = nums.clone();
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  }
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  public int[] reset() {
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    a = b.clone();
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    return a;
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  }
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  public int[] shuffle() {
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    for (int i = 0; i < a.length; i++) {
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      int ren = (int) (Math.random() * a.length);
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      int temp = a[ren];
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      a[ren] = a[i];
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      a[i] = temp;
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    }
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    return a;
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  }
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}
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/**
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 * Your Solution object will be instantiated and called as such: Solution obj = new Solution(nums);
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 * int[] param_1 = obj.reset(); int[] param_2 = obj.shuffle();
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 */