As the title says I need some help to find some test cases where my solution fails for the problem Cubes Sorting. My logic is simple, I first sort the array in decreasing order, then check if two elements are the same in the array. Then i check if the original array is in strictly decreasing order. If either the original array is not sorted in decreasing order or if there are two(or more) elements with the same value I print out YES else No. My Java Code:-

int n = in.nextInt();
int[] a = in.readArray(n);
ArrayList<Integer> sorted = new ArrayList<Integer>();
for(int i:a) sorted.add(i);
Collections.sort(sorted,Collections.reverseOrder());
boolean isPoss = false;
boolean isSame = false;
for(int i=1;i<n;i++)
	if(sorted.get(i)==sorted.get(i-1))isSame = true;
for(int i=0;i<n;i++) 
	if(a[i]!=sorted.get(i))isPoss = true;
if(isPoss||isSame) out.println("YES");
else { 
	out.println("NO");
}

The logic seems right to me but it is still giving WA.Link to WA Submission 93757010. Any help is appreciated.

Update: Seems like the same code in C++ gives AC 93846515. Is there some error in my implementation of the solution?