Gray similar code

#1

in this question, we are finding subarray but we can also have some answer if we find all pairs of four
Right or wrong ?

#2

We are not finding subarray. For case when n>130 Our answer will always be YES because of pigeon hole principal explained in video. For case n<=130 any 4 number can give answer that is why we need to use 4 For loops.

#3

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